TL;DR: A supplier’s carbon and LCA credentials are only as reliable as the data trail behind them — certificates without underlying emission factors and system boundary declarations are unverifiable.
TL;DR: In our incoming material qualification process, we reject LCA data packages where the declared carbon intensity deviates more than ±15% from our internal benchmark dataset without a documented justification.
What a Valid LCA Data Package Actually Contains — and What’s Usually Missing #
When we qualify a new substrate or consumable supplier for a brand partner’s packaging line, we request their LCA documentation as part of our standard SQF-03 supplier intake form. What comes back varies enormously. A credible LCA data package has a specific anatomy: a system boundary declaration aligned to ISO 14044:2006 and ISO 14040:2006, a declared functional unit (typically 1 kg of material at gate, or 1,000 units of finished packaging), primary vs. secondary data sourcing ratios, and a third-party critical review statement.
What we receive instead, more often than not, is a single-page carbon intensity number with no boundary documentation. That number might say “2.3 kg CO₂e per kg of material.” Without knowing whether that figure is cradle-to-gate or cradle-to-grave, whether it includes biogenic carbon, and what emission factor database was used (ecoinvent 3.9, GaBi, or a national average), the number is not comparable to anything.
Here is what we screen for on every incoming LCA submission:
| Data Point | Minimum Acceptable Standard | Common Gap |
|---|---|---|
| System boundary | ISO 14044 cradle-to-gate minimum, declared explicitly | Missing — number given without scope |
| Functional unit | Stated per kg or per 1,000 units | Omitted — leaves data incomparable |
| Emission factor database | ecoinvent 3.9+ or GaBi 2023+ | Outdated (pre-2020) or unspecified |
| Third-party review | Critical review per ISO 14044 §6 | Replaced by internal self-declaration |
| Biogenic carbon treatment | Declared as included, excluded, or per EN 16485 | Silent — creates ±0.4–0.8 kg CO₂e/kg ambiguity for paper substrates |
| Data year | Within 3 years of submission | 5–7 year old datasets, especially for energy-intensive processes |
The biogenic carbon gap is the one that catches brand partners off guard most often. For paper-based substrates certified under FSC Chain of Custody, the biogenic sequestration can represent 1.2–1.8 kg CO₂e/kg of offset credit, depending on the accounting methodology. A supplier who silently excludes it will look worse than one who includes it — or the reverse. Either way, you cannot compare two suppliers’ numbers without knowing how each handled this.
Failure Scenarios in Supplier LCA Qualification — Root Causes #
The most common failure pattern we see is a supplier submitting an Environmental Product Declaration (EPD) issued under ISO 21930:2017 that covers their full product range, rather than the specific substrate grade we are qualifying. An EPD for “uncoated woodfree paper, 60–120 gsm” can mask a carbon intensity range of 0.9–1.6 kg CO₂e/kg across that grammage band. When we specified 90 gsm offset paper for a skincare carton project and accepted a range EPD, the supplier delivered a 90 gsm grade at the high end of that carbon curve. Our brand partner had already published a 1.1 kg CO₂e/kg figure in their sustainability report. The EPD was technically compliant. The specific grade was not.
A second failure involves energy grid emission factors. A supplier based in a coal-heavy provincial grid in China may quote a carbon intensity calculated against the national average grid factor (0.5810 kg CO₂e/kWh per the 2022 Ministry of Ecology and Environment baseline). If their actual facility draws from a grid with a regional factor of 0.72–0.78 kg CO₂e/kWh, their real manufacturing footprint is 15–25% higher than declared. We now request facility-level electricity bills and cross-check against provincial grid data from the China Electricity Council as part of our SQF-03 review for any supplier whose manufacturing energy intensity exceeds 800 kWh per tonne of output.
A third scenario is LCA data that passes initial review but fails on transport assumptions. Many supplier LCAs assume ex-works delivery with no downstream logistics. If the brand partner’s target market is the EU or US West Coast, the ocean freight leg alone can add 0.08–0.15 kg CO₂e per kg of packaging material at a utilization factor of 70% for a standard 40-foot container. Suppliers who omit this, and brand partners who don’t add it back, routinely understate cradle-to-customer footprints by 8–12%.
This is where Scope 3 Category 4 emissions under the GHG Protocol Corporate Standard become relevant. For any packaging supplier claiming a product-level carbon footprint, Category 4 (upstream transportation and distribution) must be either included or explicitly excluded with a stated reason. If the submission is silent on Scope 3, that is the clearest flag we use in our internal red-flag matrix to escalate the submission to a second-level review.
Should You Require PAS 2060 Verification Before Supplier Approval? #
Not always. PAS 2060:2014 (now superseded by BSI Flex 701) is the right standard for a brand making a public carbon neutrality claim, but it is not the right instrument for qualifying a materials supplier. It covers claim verification, not product-level LCA methodology.
For supplier qualification, ISO 14044 critical review is the relevant requirement. PAS 2060 matters downstream, when the brand is assembling a full-packaging carbon neutrality claim and needs to verify offsets. Requiring PAS 2060 at the supplier qualification stage creates unnecessary friction without adding data quality. Where it does apply is when a supplier is claiming their facility or product range is “carbon neutral” — at that point, ask for the PAS 2060 Subject of the Claim document and the third-party assurance statement. If they cannot produce both, the claim is unverified.
Specification Notes for Brand Partners #
When you brief us on a new packaging project with a carbon footprint or LCA requirement, the first thing we need is your declared system boundary and your target carbon intensity per functional unit. Without those two inputs, we cannot meaningfully compare substrate suppliers against your sustainability threshold.
The most common brief gap we see is a target stated as “sustainable materials” or “low carbon” without a numeric threshold. That leaves us with no pass/fail criterion during supplier qualification. Specify a maximum acceptable carbon intensity — for example, “≤1.3 kg CO₂e per kg of primary packaging material, cradle-to-gate” — and we can screen against it using our benchmark dataset.
One iteration that costs 3–4 weeks on sampling timelines: discovering mid-sample that the brand’s preferred supplier uses an outdated ecoinvent 3.5 database. We now flag this at intake. When briefing us, tell us if you have an existing approved supplier list with LCA data already in hand — we will compare their data format against our SQF-03 requirements upfront and identify gaps before the sample order is placed. Our standard sampling timeline for substrate qualification with LCA documentation review is 18–25 working days, extending to 30–35 working days if a third-party critical review is required.
Frequently Asked Questions #
What is the minimum LCA documentation we should require from a packaging supplier?
At minimum: a system boundary declaration (cradle-to-gate or wider), the functional unit, the emission factor database and version year, and either a third-party critical review statement per ISO 14044 §6 or an EPD verified against a recognised Product Category Rule. A carbon intensity number without these supporting fields cannot be validated or compared across suppliers.
Can a supplier’s FSC certification substitute for LCA data?
No — FSC Chain of Custody certification confirms legal and responsible forest sourcing under FSC-STD-40-004, but it says nothing about the manufacturing carbon footprint. A paper substrate can be 100% FSC-certified and have a cradle-to-gate carbon intensity of 1.8 kg CO₂e/kg if the mill runs on coal-heavy grid power. The two credentials measure different things entirely.
How much does ocean freight typically add to a packaging material’s carbon footprint?
It depends on the shipping route, container utilization, and vessel type. For a China-to-Europe lane at 70% utilization on a standard container vessel, the carbon addition typically runs 0.08–0.15 kg CO₂e per kg of cargo. That figure changes if the shipment moves by air (roughly 20–30x higher per kg) or if the brand uses a certified green shipping lane under the Sea Cargo Charter. We ask brands to state their target port when we calculate a product-level footprint.
What if our supplier has an EPD but it covers a product range rather than our specific grade?
This is a common situation and worth scrutinizing. Request the underlying background data report for the EPD — this should be available from the programme operator. Check whether your specific grammage, coating type, or substrate grade sits within the declared range, and whether the EPD discloses the within-range variance. If variance is not disclosed, request a grade-specific data sheet or treat the EPD as indicative only, not confirmatory.
Is a self-declared carbon footprint from a supplier acceptable for a brand’s sustainability report?
Self-declarations are acceptable for internal qualification and preliminary benchmarking, but any figure that appears in a published sustainability report or on consumer-facing packaging should be backed by a third-party critical review per ISO 14044 or, for neutrality claims, a verified Subject of the Claim document under BSI Flex 701. Regulators in the EU under the Green Claims Directive (currently in final legislative stages as of 2024) are moving toward mandatory substantiation for all environmental claims on packaging, so the documentation standard will tighten over the next 2–3 years.
Planning a packaging project? Contact our team to request a complimentary specification review and sample quote.
The biogenic carbon point catches us every time — we had a molded pulp tray supplier quote 1.1 kg CO₂e per kg and it looked clean until we realized they’d netted out biogenic uptake without declaring it, which made their number about 30% lower than an equivalent supplier using the same ecoinvent 3.9 background data.
Had almost this exact situation with a Yiwu glass jar supplier last year — they sent a one-page PDF citing “1.8 kg CO₂e per kg” with zero boundary documentation, no functional unit, emission factors listed as “national average 2019.” We sent back our SQF intake requirements and they came back three weeks later with a GaBi-generated report that was actually usable, but it turned out the original number was cradle-to-grave and their revised cradle-to-gate figure was closer to 1.1, which completely changed how we’d scored them against our ±15% threshold.
On the biogenic carbon point — are you treating it as carbon-neutral at gate (the PAS 2050 convention) or are you requiring suppliers to separate it out explicitly in the inventory, because we’ve had recyclable paperboard suppliers submit figures either way and the delta on a cradle-to-gate number can be significant enough to flip a qualification decision.