Compostable vs biodegradable plates — what the two claims mean for procurement

Compostable is the stricter, certifiable claim: a material that breaks down into water, CO₂, biomass and inorganic compounds under a defined composting standard, leaving no toxic residue. Biodegradable only means a material breaks down through biological processes into smaller compounds — the term specifies no timeframe, conditions or end-products. EU regulatory and procurement practice now treats “biodegradable” as inferior to a certifiable “compostable” claim with a named test standard.

A compostability claim needs a named standard and a current third-party test report. The recognised standards are EN 13432 (EU industrial), ASTM D6400 (US industrial) and OK Compost Home / NF T 51-800 (home). Marketing copy that says “compostable” without a named standard is a procurement and regulatory risk.

EN 13432 certifies industrial compostability, tested at around 58°C in controlled facilities. OK Compost Home / NF T 51-800 is the TÜV Austria home-compostability scheme, tested at 20–30°C over up to 12 months — a materially stricter regime, increasingly required under Loi AGEC and its EU national derivatives.

No, not reliably. PLA requires industrial composting at 58°C+ to break down within typical certification timeframes (90–180 days). In a typical garden or home compost heap — which rarely exceeds 30–40°C — PLA degrades very slowly and behaves more like conventional plastic. Home-compostability claims for PLA should be treated as a marketing risk, not a functional property.

Palm leaf plates are a single natural fibre pressed from fallen areca leaf, with no plastic, coating or additive, so they biodegrade in standard soil conditions in about 90–120 days. Ecodyne’s EN 13432 tested — PASS, and food-contact safety is documented under LFGB §30 §31.

Bagasse (sugarcane fibre) is compostable and can be certified to ASTM D6400 or EN 13432 for industrial composting. Home-composting performance is slower and depends on the specific product, so buyers should confirm the named standard and whether any coating or PFAS treatment is present.

Only against a named standard, and only where the right composting exists. EN 13432 and ASTM D6400 certify industrial composting at around 58°C; OK Compost Home and NF T 51-800 certify home composting at 20 to 30°C over up to 12 months. A plate certified for industrial composting will not necessarily break down in a garden heap, and a “compostable” claim with no standard named behind it is a procurement and regulatory risk.

It means the plate has been tested to break down into water, CO₂, biomass and inorganic compounds under a defined composting standard, leaving no toxic residue. For a paper plate the question is really about the coating: uncoated paper composts, and a PLA-lined plate carries a plastic layer that needs industrial composting at around 58°C to break down within certification timeframes.

Look for a named standard and a current third-party test report — EN 13432, ASTM D6400, or OK Compost Home for home composting. Then look at the plate itself: if it resists grease and liquid, something is providing that barrier, and the pack should say what. Marketing copy that says “compostable” without naming a standard proves nothing.

Uncoated paper plates compost readily. Plates lined with PLA are industrial-compostable only, and behave like conventional plastic in a home heap that rarely exceeds 30 to 40°C. Plates with an undeclared grease barrier cannot be assessed at all until the coating is named. Whether any of them are accepted in your food-waste collection is set by your local waste authority, not by the pack.

It depends on the material and the conditions. Under industrial composting, certification timeframes run to 90 to 180 days. Palm leaf, as a single natural fibre with no coating, biodegrades in standard soil conditions in about 90 to 120 days. Wood is home-compostable over 6 to 12 months. PLA degrades very slowly outside an industrial facility.

Compostable is the stronger claim, because it is the one that can be certified. Compostable means breaking down into water, CO₂, biomass and inorganic compounds under a defined standard with no toxic residue. Biodegradable only means a material breaks down through biological processes — no timeframe, no conditions, no end-products specified. EU regulatory and procurement practice treats the two very differently.

Yes. PLA and other compostable polymers are plastics: they are inside the scope of the EU Single-Use Plastics Directive, and they need industrial composting at 58°C or more to break down within certification timeframes. Compostability describes their end-of-life under specific conditions; it does not change what the material is.

A single natural fibre with nothing added comes closest, because there is no second material to leave behind. Palm leaf plates are pressed from naturally fallen areca leaf with no plastic, coating or additive, and biodegrade in standard soil conditions in about 90 to 120 days. Any material claiming to be fully biodegradable should name a standard and produce a current test report.

Biodegradable plates are plates made from material that breaks down through biological processes — a description of behaviour, not of composition. The term specifies no timeframe, conditions or end-products, so it covers plates that differ enormously in practice. The useful questions are what the plate is made of, whether it carries a coating, and which composting standard it has been tested against.

No brand is best in general, and one that claims to be should be asked for its evidence. Judge the plate: how many materials it is made of, whether any coating is named, which composting standard it is tested against and whether a current report is available, and whether the food-contact migration testing under EU 1935/2004 or LFGB §30 §31 has been done.

Scrape off food waste, then follow your local waste authority’s rules — they decide whether compostable tableware belongs in the food-waste bin or in general waste, and the answer differs between councils and countries. An industrially compostable plate put in a home heap will not break down on the certified timeline, and in general waste it behaves like any other fibre.

Some do. “Compostable” describes how a plate breaks down under a named standard, not what it is made of. A PLA-lined plate can be certified compostable and still carry a plastic film, and lined fibre has been shown to shed micron-sized plastic particles into hot liquid. A single natural fibre with no lining has no plastic layer to shed.