Environmental packaging evidence guide
How UK packaging buyers can define claims, request supplier proof, compare trade-offs and keep an approval record without assuming that every alternative is environmentally preferable.
Environmental packaging decisions need two linked records: a technical specification showing what the pack is and what it must do, and an evidence file showing exactly what an environmental statement means. This guide gives procurement, sustainability, quality and production teams a practical structure for both.
Start with the exact pack, not a broad category
List every component that reaches the customer: bottle or jar, pouch or film, cap, pump, sprayer, liner, induction foil, label, adhesive, ink, sleeve, valve, spout and any secondary wrap. Record the material, colour, weight and construction of each component where the information is available. A pack described as PET, kraft, recyclable or compostable may still contain components that change the complete-pack assessment.
Keep the supplier product code, drawing revision, production site where relevant, issue date and approved sample with the specification. Environmental evidence should refer to the same product and revision. If the supplier changes a resin, layer, colour, adhesive or manufacturing site, the evidence and compatibility approval may need review.
Technical file
- Dimensioned drawing and component tolerances.
- Material or layer declaration and component weights.
- Product-contact or other regulatory declarations required for the intended use.
- Barrier, seal, torque, drop, transport or other agreed performance criteria.
- Approved artwork, label, coding and secondary-pack specification.
- Representative samples and the accepted production-trial record.
Claim file
- The exact wording proposed for product, website or customer documentation.
- Supplier declaration, certificate or test report supporting that wording.
- Scope: component, complete pack, resin, colour, size, site and market.
- Calculation basis for recycled content or material reduction.
- Collection, sorting or reprocessing context for end-of-life wording.
- Issue date, expiry or review date and named owner.
Use environmental terms precisely
| Term | What to establish | Common boundary |
|---|---|---|
| Recyclable | Exact construction, format, dimensions and the collection, sorting and reprocessing route for the intended market. | Technical potential does not guarantee household collection or successful reprocessing in practice. |
| Recycled content | Percentage, pre- or post-consumer basis, mass-balance or physical basis where relevant, and which component is covered. | A figure for one component should not be presented as a figure for the whole pack. |
| Mono-material | All functional layers, coatings, adhesives, valves, zippers, labels and closures within the declared scope. | Predominantly one polymer is not automatically the same as a single-material construction. |
| Reusable | Intended reuse system, return rate, cleaning and inspection method, component replacement and verified number of cycles. | A durable pack is not automatically part of an operating reuse system. |
| Compostable | Applicable standard or certification, industrial or home conditions, component scope and access to the required collection and treatment route. | Compostable does not mean suitable for ordinary recycling or uncontrolled disposal. |
| Biodegradable | Material, test method, environment, time, conditions and the complete product scope. | The word alone does not define where, how quickly or into what the material breaks down. |
| Lower carbon or low impact | Comparison product, functional unit, system boundary, data sources, allocation, geography and date. | A single material or transport factor is not a complete life-cycle comparison. |
Recyclability and UK collection context
Separate three questions. First, can the material be reprocessed under appropriate technical conditions? Second, is the format identified and sorted by the relevant facilities? Third, is there a collection route available to the people or businesses using the pack? A responsible statement should reflect all three and should identify any instruction such as separating a sleeve, cap or pump where that instruction is supported and realistic.
Colour, size, shape, density, labels, adhesives, metallisation, carbon-black pigments, barriers, valves and product residue can affect the result. Guidance may also change as collection and reprocessing infrastructure changes. Record the source and review date rather than treating an old assessment as permanent.
Recycled content and mass accounting
Ask whether the percentage is measured by weight and whether it refers to the whole pack, the main body or a particular component. Identify whether the content is pre-consumer or post-consumer and whether the claim uses physical recycled material in the product, a controlled mass-balance method, or another recognised chain-of-custody approach. The marketing wording should match that basis.
Recycled material may affect colour, clarity, odour, mechanical properties or regulatory suitability depending on the application and process. These are specification questions, not reasons to assume that recycled material will or will not work. The exact grade must be reviewed and tested for the intended pack.
Product protection and life-cycle trade-offs
Packaging has a function: to contain, protect, dose, communicate and enable distribution. A reduction in packaging weight can be counterproductive if it increases leakage, breakage, spoilage, rejected packs or transport damage. Conversely, an unnecessary barrier, oversized pack or excessive secondary packaging can add material without improving the accepted performance. Compare alternatives against the same product quantity, shelf life, route and acceptance criteria.
Where a formal carbon or life-cycle comparison is required, define the functional unit and boundaries before comparing figures. Include the relevant material production, conversion, filling losses, transport, product loss, reuse cycles where applicable, collection and end-of-life assumptions. Do not combine figures from studies with different boundaries as though they were directly comparable.
EPR and packaging-data readiness
UK packaging obligations depend on the organisation's role and current rules. Packaging teams should nevertheless maintain accurate component-level data: material category, weight, format, household or non-household route where applicable, supplier, product code and volume placed on the market. Keep evidence for classifications and update the record when the pack changes. Current obligations and definitions should be checked against official guidance rather than copied from an old project.
Official sources for the review file
Use current primary guidance when approving claims or data. Relevant starting points include the UK Government's packaging EPR guidance, the Competition and Markets Authority's Green Claims Code material, and WRAP's recyclability design guidance. Record the page or document used and the date reviewed.
Supplier evidence review
- Identify the issuer. Confirm who produced the declaration or report and whether that organisation has authority over the stated product.
- Match the product. Check product code, size, colour, material, component, manufacturing site and revision.
- Read the method. Note the test standard, calculation method, sample, conditions and pass criteria.
- Check the scope. Distinguish one component from the complete pack and one market from another.
- Record limitations. Retain exclusions, disposal instructions, shelf life of the evidence and any dependency on another component.
- Approve the wording. Make the customer-facing statement no broader than the evidence.
Information to send Lancing
Provide the current pack, component list and supplier declarations; the product and pack function; filling and packing process; target market; annual volumes; proposed environmental wording; and the decision criteria that matter to your organisation. Lancing can then separate confirmed facts from points requiring supplier evidence or a production trial.