Translate ISO 15105-1:2007 gas-transmission records correctly
Translating ISO 15105-1:2007 gas-transmission-rate test reports means preserving the technical meaning of plastic film barrier performance, differential-pressure measurements, gas identity, specimen thickness and numerical reporting units. Packaging engineers, quality-assurance teams, film converters and importers often need an accurate English translation of a foreign-language GTR certificate before comparing suppliers. A fluent but careless translation can mistake a low gas-transmission result for an absolute oxygen barrier, omit the pressure basis, or turn a method observation into a universal product guarantee.
If you need to translate ISO 15105-1:2007 plastics film and sheeting reports, gas transmission rate (GTR), pressure-sensor test cells, gas-chromatography measurements, multilayer laminates, test area or permeability coefficients, this guide follows the evidence in the actual laboratory record. ISO describes two differential-pressure approaches: detecting pressure change and quantifying permeating gas by chromatography. The published 2007 edition was still the current published edition when this guide was prepared in November 2026; a successor was under development. Edition identity therefore belongs in the translated document, not in an assumed update.
The practical task is to keep six things together: specimen identity, gas, pressure difference, exposure conditions, instrument method and reported quantity with its unit. This article is a specialist translation companion rather than a replacement for the standard or a general barrier-film design manual. It gives terminology decisions, worked translation examples and a document-review process so the receiving engineer can understand exactly which specimen was tested and what the laboratory actually concluded.
Definition lock: which physical quantity and document does this translation describe?
Gas-transmission-rate translation is the faithful transfer of a measured film gas-transport quantity, including its gas, units, pressure basis, temperature, specimen construction and analytical method, from the source report into intelligible target-language technical writing. It is not the act of converting every permeability number into the same marketing claim. The permitted claim remains bounded by what the signed report establishes.
Terminology and evidence: twenty-five decisions that govern technical meaning
1. Scope of the published edition
First distinguish the noun from the measurement. ISO 15105-1:2007 is about differential-pressure methods for determining gas-transmission rate through plastic film, sheeting and multilayer structures. It is not a blanket standard for every package, every gas or every storage condition. In the translated report, the phrase must remain attached to the source’s actual instrument observation or physical specimen, not a prediction about an entire product family. The practical reading question is: what exactly is the laboratory saying that a reader can verify on the certificate?
Common failure: Replacing the year with a draft edition or treating a whole sealed pouch as the tested specimen can misstate the method. This is not merely a vocabulary preference: it can change which conclusion the recipient believes the test supports. Repair: Copy the exact edition, part number and tested physical form from the cover and specimen description. Keep the corrected terminology in the glossary and review any tables, captions or executive summaries that repeat the same field.
2. Gas-transmission rate versus permeability
Read the field in context rather than word by word. A GTR result describes gas passing through the tested film under defined conditions; a permeability coefficient introduces a material-transport description dependent on the reporting convention and thickness. These quantities should not be treated as interchangeable labels. The strongest translation lets a technical reviewer trace the statement to a column, drawing, unit or logged condition without having to assume facts that were not written down. That is more useful than a polished but unspecific paraphrase.
Common failure: Calling a GTR number ‘intrinsic permeability’ without the required conversion can invalidate comparisons between different film thicknesses. This is not merely a vocabulary preference: it can change which conclusion the recipient believes the test supports. Repair: Match the original result heading, numerical dimensions, thickness and calculation notes before choosing the English noun. Keep the corrected terminology in the glossary and review any tables, captions or executive summaries that repeat the same field.
3. Pressure sensor method
Consider the downstream decision before selecting an English term. In the pressure-sensor approach, gas passes through the specimen from a higher-pressure side while a pressure measurement tracks change in a lower-pressure chamber. The translated prose must preserve which chamber is observed. Procurement, research and customer support may all read the same document, yet none should receive an exaggerated claim. A precise expression can be plain English if it keeps all of the original restrictions.
Common failure: ‘Pressure applied to the film’ is too vague if the source actually describes a low-pressure-side increase. This is not merely a vocabulary preference: it can change which conclusion the recipient believes the test supports. Repair: Identify the high- and low-pressure sides, sensor reading and elapsed interval in the report. Keep the corrected terminology in the glossary and review any tables, captions or executive summaries that repeat the same field.
4. Gas chromatograph method
The distinction becomes especially important when two reports are being compared. The gas-chromatography route determines permeating gas by analysis rather than relying solely on a pressure-rise signal. It matters when mixtures or analytical specificity appear in the report. If the original source records a condition or qualifier, carry it with the figure even when the translated sentence becomes longer. Accuracy comes from preserving the evidence structure, not compressing it.
Common failure: Do not rewrite a chromatographic result as if it were a direct pressure-gauge reading, or vice versa. This is not merely a vocabulary preference: it can change which conclusion the recipient believes the test supports. Repair: Preserve the named detector, separation or calibration procedure where the laboratory records it. Keep the corrected terminology in the glossary and review any tables, captions or executive summaries that repeat the same field.
5. High-pressure chamber
First distinguish the noun from the measurement. The upstream compartment exposes one face of the film to the test gas. A translator should avoid spatial terms such as top or left unless the apparatus diagram supports them. In the translated report, the phrase must remain attached to the source’s actual instrument observation or physical specimen, not a prediction about an entire product family. The practical reading question is: what exactly is the laboratory saying that a reader can verify on the certificate?
Common failure: Upstream and downstream can be reversed by an apparently harmless diagram-caption translation. This is not merely a vocabulary preference: it can change which conclusion the recipient believes the test supports. Repair: Label faces by functional pressure roles and copy the report’s orientation arrows. Keep the corrected terminology in the glossary and review any tables, captions or executive summaries that repeat the same field.
6. Low-pressure chamber
Read the field in context rather than word by word. The downstream compartment collects or senses gas after passage through the film. Its volume, leakage condition and sensor response may matter to the calculation and interpretation. The strongest translation lets a technical reviewer trace the statement to a column, drawing, unit or logged condition without having to assume facts that were not written down. That is more useful than a polished but unspecific paraphrase.
Common failure: Describing the compartment as ‘unpressurised’ can hide residual pressure or evacuation details. This is not merely a vocabulary preference: it can change which conclusion the recipient believes the test supports. Repair: Retain recorded vacuum or pressure ranges and any baseline checks exactly. Keep the corrected terminology in the glossary and review any tables, captions or executive summaries that repeat the same field.
7. Film specimen identity
Consider the downstream decision before selecting an English term. Product code, lot, manufacturer, layer sequence and sampling position distinguish one film from another. A result for a cut coupon cannot automatically describe every production roll. Procurement, research and customer support may all read the same document, yet none should receive an exaggerated claim. A precise expression can be plain English if it keeps all of the original restrictions.
Common failure: Omitting the lot or calling a laminate a single polymer creates false traceability. This is not merely a vocabulary preference: it can change which conclusion the recipient believes the test supports. Repair: Preserve batch numbers, sample preparation history and layer construction if available. Keep the corrected terminology in the glossary and review any tables, captions or executive summaries that repeat the same field.
8. Single-layer and multilayer construction
The distinction becomes especially important when two reports are being compared. A monolayer may be a comparatively simple material; a laminate can combine barrier, adhesion and structural layers. The measured rate belongs to the tested complete construction. If the original source records a condition or qualifier, carry it with the figure even when the translated sentence becomes longer. Accuracy comes from preserving the evidence structure, not compressing it.
Common failure: Describing only the nominal barrier layer loses the actual stack measured by the lab. This is not merely a vocabulary preference: it can change which conclusion the recipient believes the test supports. Repair: Copy each listed material and layer order without guessing thickness contributions. Keep the corrected terminology in the glossary and review any tables, captions or executive summaries that repeat the same field.
9. Exposed test area
First distinguish the noun from the measurement. The effective area is the portion of the specimen through which transmission is measured, not necessarily the size of the entire sheet removed from a roll. In the translated report, the phrase must remain attached to the source’s actual instrument observation or physical specimen, not a prediction about an entire product family. The practical reading question is: what exactly is the laboratory saying that a reader can verify on the certificate?
Common failure: Confusing cut specimen dimensions with test-cell area misrepresents a calculation input. This is not merely a vocabulary preference: it can change which conclusion the recipient believes the test supports. Repair: Keep exposed area and overall specimen dimensions in separate report fields. Keep the corrected terminology in the glossary and review any tables, captions or executive summaries that repeat the same field.
10. Measured film thickness
Read the field in context rather than word by word. Thickness can affect the transport of gases and the interpretation of permeability. A report may show measurements at several points, an average and variation. The strongest translation lets a technical reviewer trace the statement to a column, drawing, unit or logged condition without having to assume facts that were not written down. That is more useful than a polished but unspecific paraphrase.
Common failure: Never substitute supplier nominal micrometres for laboratory measured thickness without clearly marking the source. This is not merely a vocabulary preference: it can change which conclusion the recipient believes the test supports. Repair: Distinguish nominal, measured, minimum, maximum and average thickness values. Keep the corrected terminology in the glossary and review any tables, captions or executive summaries that repeat the same field.
11. Gas species and purity
Consider the downstream decision before selecting an English term. Oxygen, nitrogen, carbon dioxide and other gases have different material interactions. The gas used, its stated purity and mixture composition are part of the test identity. Procurement, research and customer support may all read the same document, yet none should receive an exaggerated claim. A precise expression can be plain English if it keeps all of the original restrictions.
Common failure: Translate a generic source word meaning ‘test gas’ as ‘oxygen’ only when oxygen is explicitly recorded. This is not merely a vocabulary preference: it can change which conclusion the recipient believes the test supports. Repair: Keep chemical formulae and reported concentration or purity figures with the original test conditions. Keep the corrected terminology in the glossary and review any tables, captions or executive summaries that repeat the same field.
12. Temperature as a condition
The distinction becomes especially important when two reports are being compared. Transmission properties depend on temperature, which is why a reported value must remain attached to the test temperature. A room-condition phrase may not prove the specimen was held at that temperature. If the original source records a condition or qualifier, carry it with the figure even when the translated sentence becomes longer. Accuracy comes from preserving the evidence structure, not compressing it.
Common failure: Deleting 23 °C or changing it to a marketing ‘ambient’ claim removes context. This is not merely a vocabulary preference: it can change which conclusion the recipient believes the test supports. Repair: Identify chamber temperature, conditioning temperature and any recorded tolerance separately. Keep the corrected terminology in the glossary and review any tables, captions or executive summaries that repeat the same field.
13. Humidity and moisture exposure
First distinguish the noun from the measurement. Some polymer structures respond to humidity or moisture-conditioning history. Even where humidity is not the central variable, reported conditioning should not disappear in translation. In the translated report, the phrase must remain attached to the source’s actual instrument observation or physical specimen, not a prediction about an entire product family. The practical reading question is: what exactly is the laboratory saying that a reader can verify on the certificate?
Common failure: An unqualified ‘dry film’ claim may overstate what a conditioning record says. This is not merely a vocabulary preference: it can change which conclusion the recipient believes the test supports. Repair: Copy relative-humidity values and distinguish conditioning from measurement conditions. Keep the corrected terminology in the glossary and review any tables, captions or executive summaries that repeat the same field.
14. Pressure difference and partial pressure
Read the field in context rather than word by word. Gases move in response to their chemical-potential conditions; practical reports may express a total-pressure difference or partial-pressure basis. These are not always equivalent in mixed-gas systems. The strongest translation lets a technical reviewer trace the statement to a column, drawing, unit or logged condition without having to assume facts that were not written down. That is more useful than a polished but unspecific paraphrase.
Common failure: Replacing partial pressure with absolute pressure can break the meaning of the test. This is not merely a vocabulary preference: it can change which conclusion the recipient believes the test supports. Repair: Preserve Δp, pressure units, reference conditions and gas-composition notes without inventing conversions. Keep the corrected terminology in the glossary and review any tables, captions or executive summaries that repeat the same field.
15. Rate units and normalization
Consider the downstream decision before selecting an English term. Barrier reports sometimes express volumes per area per time and pressure difference, while other data sheets use a simpler area-time shorthand. Dimensions must be read, not inferred. Procurement, research and customer support may all read the same document, yet none should receive an exaggerated claim. A precise expression can be plain English if it keeps all of the original restrictions.
Common failure: cm³/(m²·day·atm) and cm³/(m²·day) are not the same literal unit string. This is not merely a vocabulary preference: it can change which conclusion the recipient believes the test supports. Repair: Copy the exact symbols, denominator and any standard-volume reference; explain a conversion only if performed transparently. Keep the corrected terminology in the glossary and review any tables, captions or executive summaries that repeat the same field.
16. Permeation lag and steady behaviour
The distinction becomes especially important when two reports are being compared. A pressure trace can have an initial transient before a more stable measurement region. The translation should distinguish the waiting period from the interval used for a reported slope. If the original source records a condition or qualifier, carry it with the figure even when the translated sentence becomes longer. Accuracy comes from preserving the evidence structure, not compressing it.
Common failure: Calling the first observed detection a steady-state GTR can lead to a false interpretation. This is not merely a vocabulary preference: it can change which conclusion the recipient believes the test supports. Repair: Preserve the report’s time definitions, stabilization criterion and observation window. Keep the corrected terminology in the glossary and review any tables, captions or executive summaries that repeat the same field.
17. Sealing, leaks and blank tests
First distinguish the noun from the measurement. An instrument can register gas through a cell seal, a pinhole or the specimen. Baseline, blank and leak checks help explain what laboratory personnel considered valid. In the translated report, the phrase must remain attached to the source’s actual instrument observation or physical specimen, not a prediction about an entire product family. The practical reading question is: what exactly is the laboratory saying that a reader can verify on the certificate?
Common failure: Do not turn ‘leak check passed’ into ‘packaging material was leakproof’. This is not merely a vocabulary preference: it can change which conclusion the recipient believes the test supports. Repair: Identify whether the check applies to the apparatus, specimen or finished container. Keep the corrected terminology in the glossary and review any tables, captions or executive summaries that repeat the same field.
18. Instrument calibration and verification
Read the field in context rather than word by word. Calibration records relate readings to reference instruments, whereas routine instrument checks may establish suitability for a session. These terms carry different evidential weight. The strongest translation lets a technical reviewer trace the statement to a column, drawing, unit or logged condition without having to assume facts that were not written down. That is more useful than a polished but unspecific paraphrase.
Common failure: Translate every routine check as accredited calibration and the recipient may overtrust the result. This is not merely a vocabulary preference: it can change which conclusion the recipient believes the test supports. Repair: Keep calibration date, reference identifier, check material and instrument serial number distinct. Keep the corrected terminology in the glossary and review any tables, captions or executive summaries that repeat the same field.
19. Replicates and averages
Consider the downstream decision before selecting an English term. Multiple coupons may be tested from one lot; individual results and the mean can differ. A mean alone does not describe sample variability or production consistency. Procurement, research and customer support may all read the same document, yet none should receive an exaggerated claim. A precise expression can be plain English if it keeps all of the original restrictions.
Common failure: Averaging across different gases or conditions without disclosure would make a false aggregate. This is not merely a vocabulary preference: it can change which conclusion the recipient believes the test supports. Repair: Keep sample count, individual values, mean, dispersion and exclusions attached to the same conditions. Keep the corrected terminology in the glossary and review any tables, captions or executive summaries that repeat the same field.
20. Limits of detection and reporting
The distinction becomes especially important when two reports are being compared. An output below a detection or quantification limit is a censored observation, not a measured zero. Different languages may use abbreviations whose English equivalents require care. If the original source records a condition or qualifier, carry it with the figure even when the translated sentence becomes longer. Accuracy comes from preserving the evidence structure, not compressing it.
Common failure: Replacing ‘below measurable range’ with ‘impermeable’ is a scientific overstatement. This is not merely a vocabulary preference: it can change which conclusion the recipient believes the test supports. Repair: Preserve the symbol for less than, the numerical limit and the report’s analytic meaning. Keep the corrected terminology in the glossary and review any tables, captions or executive summaries that repeat the same field.
21. Test uncertainty and significant figures
First distinguish the noun from the measurement. Uncertainty, rounding and the number of significant figures influence what the result can support. A translator must not add precision because the target language uses a different decimal convention. In the translated report, the phrase must remain attached to the source’s actual instrument observation or physical specimen, not a prediction about an entire product family. The practical reading question is: what exactly is the laboratory saying that a reader can verify on the certificate?
Common failure: Changing 0.030 to 0.03 might erase reported precision; moving a decimal separator can be catastrophic. This is not merely a vocabulary preference: it can change which conclusion the recipient believes the test supports. Repair: Check decimal commas, superscripts, exponent signs, uncertainty statements and instrument range. Keep the corrected terminology in the glossary and review any tables, captions or executive summaries that repeat the same field.
22. Lot acceptance versus laboratory observation
Read the field in context rather than word by word. A certificate may display the numerical test and a separate client-specific acceptance specification. The standard method itself need not establish a pass/fail product requirement. The strongest translation lets a technical reviewer trace the statement to a column, drawing, unit or logged condition without having to assume facts that were not written down. That is more useful than a polished but unspecific paraphrase.
Common failure: Translating ‘meets customer limit’ as ‘ISO certified barrier’ invents a compliance claim. This is not merely a vocabulary preference: it can change which conclusion the recipient believes the test supports. Repair: State the criterion owner, threshold, decision rule and evaluated specimen only if recorded. Keep the corrected terminology in the glossary and review any tables, captions or executive summaries that repeat the same field.
23. Direction and film face
Consider the downstream decision before selecting an English term. One side of a laminated film may face product and the other the environment. Changing orientation can matter when tested faces or asymmetric layers are described. Procurement, research and customer support may all read the same document, yet none should receive an exaggerated claim. A precise expression can be plain English if it keeps all of the original restrictions.
Common failure: Do not invert inner and outer faces just to make the English sentence smoother. This is not merely a vocabulary preference: it can change which conclusion the recipient believes the test supports. Repair: Keep arrows, layer order, labels and printed-side references aligned with the lab diagram. Keep the corrected terminology in the glossary and review any tables, captions or executive summaries that repeat the same field.
24. Method revision and certificate date
The distinction becomes especially important when two reports are being compared. A 2007 standard can be used on a test performed years later. The standard edition, report issue date, calibration date and manufacturing date refer to different events. If the original source records a condition or qualifier, carry it with the figure even when the translated sentence becomes longer. Accuracy comes from preserving the evidence structure, not compressing it.
Common failure: Translating all four dates as ‘test date’ causes document-control errors. This is not merely a vocabulary preference: it can change which conclusion the recipient believes the test supports. Repair: Create a date ledger and preserve any amendments or replacement notice as source-specific facts. Keep the corrected terminology in the glossary and review any tables, captions or executive summaries that repeat the same field.
25. Supplier comparisons
First distinguish the noun from the measurement. Comparing two film products is only meaningful after checking equivalent gases, temperatures, pressure regimes, units, area conventions and specimen constructions. Language quality protects this comparison. In the translated report, the phrase must remain attached to the source’s actual instrument observation or physical specimen, not a prediction about an entire product family. The practical reading question is: what exactly is the laboratory saying that a reader can verify on the certificate?
Common failure: A translated ‘better barrier’ headline is unsupported if the tests were conducted under incomparable conditions. This is not merely a vocabulary preference: it can change which conclusion the recipient believes the test supports. Repair: Place source and target figures side by side with matching condition fields before drawing any conclusion. Keep the corrected terminology in the glossary and review any tables, captions or executive summaries that repeat the same field.
Worked translation situations: from a source record to defensible English
The following teaching examples are illustrative, not quotations from a real laboratory or mandatory ISO acceptance limits. Each shows an information-preservation decision. When numbers are used, their accuracy is limited to the fictional example; actual certificates take precedence.
Case 1: Supplier A versus Supplier B
Source situation. One certificate lists a GTR at 23 °C with a pressure denominator; another quotes an oxygen transmission rate at a different temperature with no pressure denominator. The question is what an English-language reader should be able to know from this limited evidence, and what must remain open.
Translation decision. Do not rank the films from the two headline numbers. Translate both full units and conditions, note non-comparability and ask for a harmonized test or a technically justified conversion. To resolve the sentence, locate the primary evidence before rewriting the conclusion. Keep the calculation or description linked to the test method, and make an explicit note of any field that cannot be confirmed. A reader should not have to reverse-engineer the author’s assumption. If the signed report offers additional context, use it; otherwise state the limitation clearly rather than inventing an official result.
Case 2: A decimal-comma result
Source situation. A German-language table shows 0,025 and uses cm³/(m²·d·atm). The question is what an English-language reader should be able to know from this limited evidence, and what must remain open.
Translation decision. Render the decimal comma as 0.025 for an English-language audience if the document style requires it, but do not change its magnitude, denominator or unit convention. The better translation allows the customer to compare the target-language sentence with the source document line for line. If a condition is missing, the translation needs a question or qualification, not a guessed substitute. This also gives the laboratory a clear issue to answer. If the signed report offers additional context, use it; otherwise state the limitation clearly rather than inventing an official result.
Case 3: A laminate described by a shorthand
Source situation. A purchase order says PA/EVOH/PE while the certificate says a multilayer film coupon with a batch number. The question is what an English-language reader should be able to know from this limited evidence, and what must remain open.
Translation decision. Expand abbreviations only where the manufacturer documentation resolves them; keep the sample number and do not claim the order code proves the tested layer thicknesses. Notice how a small lexical choice can become a material-quality claim. Preserve the difference between an observation, an inference and a purchase specification. A translation can be straightforward without becoming stronger than the original assertion. If the signed report offers additional context, use it; otherwise state the limitation clearly rather than inventing an official result.
Case 4: Pressure rise mislabelled
Source situation. The source note states that downstream pressure increased steadily during the observation window. The question is what an English-language reader should be able to know from this limited evidence, and what must remain open.
Translation decision. Translate ‘pressure rise in the low-pressure chamber’ rather than ‘the film increased pressure’; the first identifies an instrument observation, while the second implies a physical property. Use the worked situation as a review rehearsal. Separate the numerical field, its unit, the measurement condition, the sample identifier and any later commentary. Verify that the same distinctions survive in the table title and any certificate summary. If the signed report offers additional context, use it; otherwise state the limitation clearly rather than inventing an official result.
Case 5: Chromatography versus sensor
Source situation. A bilingual laboratory template has checkboxes for two analytical routes but only chromatography is selected. The question is what an English-language reader should be able to know from this limited evidence, and what must remain open.
Translation decision. Keep the unticked method as an option in the original form, and name the selected test clearly in the executive summary. To resolve the sentence, locate the primary evidence before rewriting the conclusion. Keep the calculation or description linked to the test method, and make an explicit note of any field that cannot be confirmed. A reader should not have to reverse-engineer the author’s assumption. If the signed report offers additional context, use it; otherwise state the limitation clearly rather than inventing an official result.
Case 6: Specimen size versus active area
Source situation. A 100 mm square sample is clamped in a cell with a smaller exposed circular area. The question is what an English-language reader should be able to know from this limited evidence, and what must remain open.
Translation decision. Give both dimensions with labels. Do not divide gas amount by the cut sheet area; the laboratory calculation uses the effective transmission area. The better translation allows the customer to compare the target-language sentence with the source document line for line. If a condition is missing, the translation needs a question or qualification, not a guessed substitute. This also gives the laboratory a clear issue to answer. If the signed report offers additional context, use it; otherwise state the limitation clearly rather than inventing an official result.
Case 7: Thickness report mismatch
Source situation. The factory datasheet says 50 µm nominal, while the lab report states 54 µm measured. The question is what an English-language reader should be able to know from this limited evidence, and what must remain open.
Translation decision. Translate the first as a supplier specification and the second as an experimental measurement, without silently normalizing the difference. Notice how a small lexical choice can become a material-quality claim. Preserve the difference between an observation, an inference and a purchase specification. A translation can be straightforward without becoming stronger than the original assertion. If the signed report offers additional context, use it; otherwise state the limitation clearly rather than inventing an official result.
Case 8: Less-than reporting
Source situation. A result is written as GTR < 0.1 in a valid method-specific unit. The question is what an English-language reader should be able to know from this limited evidence, and what must remain open.
Translation decision. Retain the inequality sign and detection or reporting context. ‘Zero transmission’ and ‘airtight’ would be stronger claims than the laboratory made. Use the worked situation as a review rehearsal. Separate the numerical field, its unit, the measurement condition, the sample identifier and any later commentary. Verify that the same distinctions survive in the table title and any certificate summary. If the signed report offers additional context, use it; otherwise state the limitation clearly rather than inventing an official result.
Case 9: Time-dependent observation
Source situation. An early trace includes stabilization, followed by a linear fitted section used for final calculation. The question is what an English-language reader should be able to know from this limited evidence, and what must remain open.
Translation decision. Label each stage accurately and preserve the chosen slope or fitting interval if reported; do not quote the entire elapsed duration as effective steady-state sampling. To resolve the sentence, locate the primary evidence before rewriting the conclusion. Keep the calculation or description linked to the test method, and make an explicit note of any field that cannot be confirmed. A reader should not have to reverse-engineer the author’s assumption. If the signed report offers additional context, use it; otherwise state the limitation clearly rather than inventing an official result.
Case 10: Test gas not named
Source situation. A partial scan shows a numerical GTR but the test-gas column was cropped out. The question is what an English-language reader should be able to know from this limited evidence, and what must remain open.
Translation decision. Translate only the visible data and request the missing column or complete report before calling it OTR or CO₂ transmission. The better translation allows the customer to compare the target-language sentence with the source document line for line. If a condition is missing, the translation needs a question or qualification, not a guessed substitute. This also gives the laboratory a clear issue to answer. If the signed report offers additional context, use it; otherwise state the limitation clearly rather than inventing an official result.
Case 11: Package claim from film coupon
Source situation. A marketing team wants to translate a film GTR into ‘finished pouch guaranteed oxygen proof’. The question is what an English-language reader should be able to know from this limited evidence, and what must remain open.
Translation decision. Keep ‘film specimen tested’ and recommend separate package-integrity evidence before extending the claim to seals, edges, folds, valves or shipping damage. Notice how a small lexical choice can become a material-quality claim. Preserve the difference between an observation, an inference and a purchase specification. A translation can be straightforward without becoming stronger than the original assertion. If the signed report offers additional context, use it; otherwise state the limitation clearly rather than inventing an official result.
Case 12: Unit conversion in a sales brochure
Source situation. A supplier requests cm³/(m²·day·atm) converted into another unit system. The question is what an English-language reader should be able to know from this limited evidence, and what must remain open.
Translation decision. Show the original quantity, conversion factor, reference pressure and time basis. Have the calculation independently checked rather than rounding intermediate values invisibly. Use the worked situation as a review rehearsal. Separate the numerical field, its unit, the measurement condition, the sample identifier and any later commentary. Verify that the same distinctions survive in the table title and any certificate summary. If the signed report offers additional context, use it; otherwise state the limitation clearly rather than inventing an official result.
Case 13: A disputed calibration statement
Source situation. A laboratory record says ‘verification passed’ but the cover letter translates it as ‘fully calibrated’. The question is what an English-language reader should be able to know from this limited evidence, and what must remain open.
Translation decision. Use ‘verification’ if that is the documented activity; request calibration evidence separately when contractual requirements call for it. To resolve the sentence, locate the primary evidence before rewriting the conclusion. Keep the calculation or description linked to the test method, and make an explicit note of any field that cannot be confirmed. A reader should not have to reverse-engineer the author’s assumption. If the signed report offers additional context, use it; otherwise state the limitation clearly rather than inventing an official result.
Case 14: A single high outlier
Source situation. Three coupons yield two close results and one much larger value, with no documented exclusion. The question is what an English-language reader should be able to know from this limited evidence, and what must remain open.
Translation decision. Carry all recorded values, the reported summary and any unresolved anomaly. Do not remove the inconvenient value or claim a uniform coating without supporting inspection. The better translation allows the customer to compare the target-language sentence with the source document line for line. If a condition is missing, the translation needs a question or qualification, not a guessed substitute. This also gives the laboratory a clear issue to answer. If the signed report offers additional context, use it; otherwise state the limitation clearly rather than inventing an official result.
Case 15: A replacement draft appears
Source situation. The team finds a draft successor standard while the signed certificate cites ISO 15105-1:2007. The question is what an English-language reader should be able to know from this limited evidence, and what must remain open.
Translation decision. Translate the historical certificate against its stated edition, and treat the successor as future context, not an automatic retroactive update. Notice how a small lexical choice can become a material-quality claim. Preserve the difference between an observation, an inference and a purchase specification. A translation can be straightforward without becoming stronger than the original assertion. If the signed report offers additional context, use it; otherwise state the limitation clearly rather than inventing an official result.
A repeatable quality-control workflow
Begin with document identity: edition, issuing laboratory, client, specimen batch, report number and revision. Separate the original signed report from sales copy, email interpretation and unattested screenshots. Mark every occurrence of the gas species, thickness, exposed area, pressure regime, temperature, instrument method and unit string. Make a two-column terminology record that preserves the source phrase beside the approved English equivalent. Read tables aloud as complete statements with subject, figure, denominator and condition.
Next verify computational integrity. Compare each decimal value with the source, especially a decimal comma or scientific notation. Review superscripts, pressure denominators and time units as a single quantity rather than independent typographic elements. Ensure that no symbol has been dropped by a page export or a font replacement. Confirm that any conversion is mathematically reproducible and identify it as an editorial conversion rather than a source measurement. Carry limits and uncertainty statements into the summary.
Finally perform an evidence-to-claim audit. Read the translated conclusion without looking at the source. Could a buyer reasonably interpret it as a guarantee of a whole pouch, all temperatures, all gases or all production batches? If so, narrow it back to the documented specimen and conditions. Ask a second reviewer with materials knowledge to check ambiguous layer names, analytical methods and unusual unit dimensions. Record unresolved questions in a visible note rather than editing the document to make them disappear.
Questions people ask when translating film barrier reports
Does a low GTR mean a food pouch is airtight?
No. The measurement concerns the tested film or sheeting and the stated gas and laboratory conditions. A finished pouch also has seals, creases, closures and possible damage. Translate the actual film result rather than promising performance for untested package features. When preparing a bilingual version, put the relevant method, sample number and test conditions beside the answer so that it cannot be copied into a different product context. Preserve the boundary between an observed laboratory result and a separate design or commercial decision. A reviewer should be able to point to the supporting line in the source.
Can I call GTR and OTR the same thing?
Only when oxygen is the stated test gas and the source terminology supports the usage. GTR is a general category; OTR identifies oxygen specifically. A generic GTR certificate does not authorize the translator to pick oxygen as the tested species. When preparing a bilingual version, put the relevant method, sample number and test conditions beside the answer so that it cannot be copied into a different product context. Preserve the boundary between an observed laboratory result and a separate design or commercial decision. A reviewer should be able to point to the supporting line in the source.
Why is the pressure basis important?
A denominator involving pressure difference changes the dimensions of a reported coefficient or normalized transmission figure. If one report uses an additional pressure denominator and another does not, direct numerical comparison without normalization is unsafe. When preparing a bilingual version, put the relevant method, sample number and test conditions beside the answer so that it cannot be copied into a different product context. Preserve the boundary between an observed laboratory result and a separate design or commercial decision. A reviewer should be able to point to the supporting line in the source.
Should I convert all units into English imperial units?
No. Retain the source unit and convert only where readers or contract specifications need it. Show both values, state the basis and check dimensional consistency. A silent conversion loses the audit trail. When preparing a bilingual version, put the relevant method, sample number and test conditions beside the answer so that it cannot be copied into a different product context. Preserve the boundary between an observed laboratory result and a separate design or commercial decision. A reviewer should be able to point to the supporting line in the source.
Is a pressure sensor the same as a gas chromatograph?
No. They are different analytical approaches described by the standard. The translated procedure must preserve which route the laboratory used and what was measured, rather than treating both instruments as generic permeation meters. When preparing a bilingual version, put the relevant method, sample number and test conditions beside the answer so that it cannot be copied into a different product context. Preserve the boundary between an observed laboratory result and a separate design or commercial decision. A reviewer should be able to point to the supporting line in the source.
Does film thickness always tell me the barrier result?
No. Thickness can affect transport but layer chemistry, structure, defects and measurement conditions matter. When translating multilayer product data, distinguish measured specimen construction from simplified claims about the nominal barrier resin. When preparing a bilingual version, put the relevant method, sample number and test conditions beside the answer so that it cannot be copied into a different product context. Preserve the boundary between an observed laboratory result and a separate design or commercial decision. A reviewer should be able to point to the supporting line in the source.
What should I do with an unreported gas identity?
Mark it as absent rather than infer it. Seek the complete signed report, especially before the translated number is used for supplier approval, food-package decisions or material qualification. When preparing a bilingual version, put the relevant method, sample number and test conditions beside the answer so that it cannot be copied into a different product context. Preserve the boundary between an observed laboratory result and a separate design or commercial decision. A reviewer should be able to point to the supporting line in the source.
Can a translation claim ISO certification?
Not merely because a laboratory used an ISO test method. Method conformity, laboratory accreditation, client acceptance and formal product certification are separate statements that must each be supported by the document. When preparing a bilingual version, put the relevant method, sample number and test conditions beside the answer so that it cannot be copied into a different product context. Preserve the boundary between an observed laboratory result and a separate design or commercial decision. A reviewer should be able to point to the supporting line in the source.
What if the standard is being revised?
Identify the published edition written on the certificate. A draft or future edition does not silently replace a dated method reference. Check the current ISO catalogue before producing an updated interpretive note. When preparing a bilingual version, put the relevant method, sample number and test conditions beside the answer so that it cannot be copied into a different product context. Preserve the boundary between an observed laboratory result and a separate design or commercial decision. A reviewer should be able to point to the supporting line in the source.
What does a translator deliver besides prose?
A reliable delivery includes the translated report, an unchanged data table, a unit and symbol check, a terminology sheet, an ambiguity register and a list of questions for the technical owner where the source does not support a definitive conclusion. When preparing a bilingual version, put the relevant method, sample number and test conditions beside the answer so that it cannot be copied into a different product context. Preserve the boundary between an observed laboratory result and a separate design or commercial decision. A reviewer should be able to point to the supporting line in the source.
Practice plan: learning technical translation by working with evidence
In the first week, practise expanding GTR, pressure-sensor, gas chromatography, effective area, measured thickness and conditioning into full plain-English definitions. In the second, annotate two fictional reports with their gases, chamber roles, pressure denominators and units; identify any incompatible comparison. In the third, translate tables both ways, including inequality signs, decimal commas and scientific notation. In the fourth, invite a materials specialist to challenge every product claim and maintain an ambiguity log. This sequence teaches more than memorizing vocabulary because it connects every word to evidence.
The safe result is a readable technical translation that does not conceal the test’s limitations. Specialists may still need the licensed standard and original laboratory records for compliance or disputes. The translator’s job is to preserve the path from evidence to statement, not replace a certified laboratory, supplier engineer or packaging qualification programme.
Primary sources and existing learning routes
Official publication record: ISO 15105-1:2007, Plastics — Film and sheeting — Determination of gas-transmission rate — Part 1: Differential-pressure methods. ISO’s catalogue described the 2007 edition as published and a successor as under development at the time of writing (November 2026). This page explains translation and report interpretation; it does not reproduce the paid standard.
For broader oxygen and water-vapour packaging vocabulary, see the existing OTR/WVTR translation article (if a URL has since moved, use the site search). The overarching method belongs to Master Art of Translation — EDKSG-TRANS-MASTER-WORLD-000, with vocabulary learning at the Vocabulary Learning Hub and meaning-focused English at How English Works — Translation and Meaning Across Languages. These references remain the canonical owners of their respective topics.