Packaging Standards Explained for Flat Pouch & Sachet

How Flat Pouch and Sachet Standards Actually Map to Each Other Across Markets #

The first thing to understand: there is no single “global” standard for flexible pouch and sachet packaging. What exists is a collection of national and regional standards that partially overlap, use different test conditions, and report results in incompatible units. When a brand writes a packaging brief without specifying which standard applies, the factory interprets it using whichever version they know best — which, for a Chinese supplier, is GB/T.

The table below covers the standards most commonly cited in tenders we receive from US, EU, and Australian buyers, mapped against their Chinese equivalents.

The GB/T 19789 test for OTR runs at 23°C and 50% RH — aligned with ISO 15105-2 but not with ASTM D3985, which runs at 0% RH. For a high-barrier aluminium foil laminate, the difference is small. For a metallized PET/PE structure at 12μm metallization, we have seen OTR values differ by a factor of 2 to 3 between the two test conditions on the same laminate roll. That is not a calibration error. That is the standard working as designed.

Our incoming material inspection logs those OTR values at both conditions where the laminate is destined for humidity-sensitive contents — we call this the dual-condition barrier check in our internal QC-F12 incoming material record.

Where Misapplied Standards Cause Real Production Problems #

The most common failure scenario we see starts with seal strength specification. A brand brief arrives specifying “minimum seal peel strength 25 N/15mm” with no citation. Our team runs ASTM F88 Fixture A (free film, unsupported) because that is the more conservative test. The brand’s laboratory runs the same ASTM F88 but with Fixture B (supported film, backing plate). Fixture B consistently yields values 15–25% higher on the same sealed sample because the backing plate prevents peeling deformation. The pouch ships, the brand’s QC team rejects the first batch against their internal spec, and neither party is wrong — they simply used the same standard number with different fixture conditions. ASTM F88 requires fixture type to be declared in the specification; most briefs omit this.

The second scenario involves food contact compliance. EU Regulation No. 10/2011 covers plastic materials in direct food contact but explicitly excludes surface coatings and adhesives, which fall under separate national legislation across EU member states. A brief that states “compliant with EU 10/2011” for a reverse-printed, solvent-laminated sachet does not cover the adhesive layer — which is the most common migration risk in a multi-layer laminate. We ask every EU-bound food sachet brief to specify whether the adhesive system needs individual compliance documentation. Brands that do not understand this distinction often require an extra 3–4 weeks of documentation sourcing before sample approval can proceed.

The third scenario is compostability labelling. ASTM D6400 and EN 13432 are frequently cited as equivalent — they are not. Both certify industrial compostability, but EN 13432 requires 90% disintegration within 12 weeks at 58°C, while ASTM D6400 allows 60% disintegration at 60°C. More practically: a pouch certified under ASTM D6400 carries the BPI (Biodegradable Products Institute) mark in the US. The same pouch cannot carry the seedling logo (TÜV or DIN CERTCO) in the EU without separate EN 13432 testing. We have seen US brands attempt to ship EN 13432-labelled pouches into the US market without BPI certification, and vice versa. Neither certification transfers across the Atlantic.

Is ISO 12647-6 Actually Used for Gravure Pouch Printing? #

Rarely, in practice. ISO 12647-6 was written for flexographic printing on corrugated and cartonboard. For gravure-printed flexible packaging — which is how most high-volume sachets and pouches are produced at our facility — the more operationally relevant reference is ISO 12647-7 (proof verification) combined with G7 methodology for tonal response calibration.

That said, G7 is not a printing standard per se; it is a calibration methodology developed by Idealliance. When a brand brief cites G7 compliance, what they typically want is a deltaE 2000 average of ≤2.0 on solid ink densities against a signed-off proof. On our gravure lines, we run inline spectrophotometric checks at ±0.15 ΔE tolerance on brand-critical spot colours. This holds for CMYK process; for Pantone spot colours outside the CMYK gamut on metallized substrates, that tolerance widens to ±0.25 ΔE in practice.

Specification Notes for Brand Partners #

When you brief us on a flat pouch or sachet project, the single most useful thing you can include is the destination market and the end product category — not just the packaging dimensions. The barrier specification, the food contact documentation path, and the print standard we target all change depending on whether the sachet ships to a US retailer, an EU supermarket, or an Australian pharmacy.

The gap we see most often in briefs: no fixture type stated for seal strength tests, and no distinction made between the inner film food contact layer and the full laminate structure for migration compliance. A brief that says “food safe laminate” tells us nothing actionable about which layer requires which documentation.

Our typical timeline from brief to development samples is 18–22 working days for standard laminate structures and 28–35 working days for structures requiring adhesive or ink migration testing documentation. If you need EN 13432 or ASTM D6400 certification for the film structure, allow an additional 8–10 weeks for third-party certification testing — this runs in parallel with production development but cannot be shortened. Providing us with a target country, product category (food/non-food), and a signed-off colour proof or Pantone reference at brief stage removes two of the most common causes of sample iteration.

Frequently Asked Questions #

If my brief specifies ASTM barrier standards, will a Chinese supplier understand and test to the same conditions?

It depends on which specific test is specified. ASTM D3985 (OTR) and ASTM F1249 (WVTR) are widely used by accredited Chinese labs with the same MOCON-type instrumentation, so the physical test is comparable. Where divergence occurs is test conditions: ASTM D3985 runs at 0% RH by default, while many Chinese labs default to 23°C/50% RH conditions aligned with GB/T 19789. When submitting an ASTM-referenced barrier spec, state the temperature and humidity conditions explicitly in addition to the standard number. A supplier who cannot test at stated conditions should provide a third-party accredited test report rather than an in-house result.

Do EU 10/2011 and FDA 21 CFR cover the same materials?

No, and the coverage gaps matter. EU 10/2011 maintains a positive list of authorised monomers and additives for plastic food contact materials, with specific migration limits (SML) expressed in mg/kg food. FDA 21 CFR operates through a broader GRAS (Generally Recognized As Safe) framework and food additive petition system — not a positive list. A laminate cleared under EU 10/2011 may contain materials not individually cleared under FDA regulations, and a material with FDA food additive status does not automatically meet EU 10/2011 requirements. For dual-market products, we request both compliance declarations at brief stage, as the documentation paths are separate.

Can the same flat pouch structure carry both the EU seedling compostability logo and the US BPI certification mark?

Yes, but it requires two separate certification tests — EN 13432 for the EU mark and ASTM D6400 for BPI. The material itself can qualify under both if the laminate disintegration and ecotoxicity criteria are met for each standard, but certification bodies do not cross-recognise. Budget roughly 8–10 weeks and third-party lab fees for each certification stream. We have run dual-certification projects for export brands; the laminate qualification test phases can overlap, but the paperwork and logo licencing run on separate timelines.

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