According to Compostable package suppliers, compostable degradable plastic is a type of biodegradable material, which refers to a class of materials that can finally be completely converted into carbon dioxide, water and minerals after a certain time span under aerobic composting conditions.
The following is the EU's compostable and degradable plastic evaluation standards and their certification introduced by Compostable package suppliers for your reference!
The Compostable package supplier stated that the standard for compostable degradable plastics implemented in the EU is the standard En 13432 "Requirements for the final evaluation of packaging materials recycled by composting and biodegradation" developed by the European Standards Committee, which is EU Directive 94/ One of the important components in 62/EC. En 13432 requires and defines compostable materials in four areas:

(1) Restriction of chemical substances: to specify the minimum content of organic substances, heavy metals and fluorine in compostable materials;
(2) Biodegradability: For controllable composting materials, more than 90% must be finally converted into carbon dioxide, water and minerals within a maximum of 6 months under aerobic composting conditions;
(3) Disintegration performance: specify the maximum thickness of the controllable compost material that can be used, and the controllable compost degradable material under this thickness must disintegrate more than 90% of the debris that can pass through the 22 mm screen within a maximum of 12 weeks under aerobic composting conditions ;
(4) Ecotoxicological properties: After the specially selected plants are re-introduced into the compostable decomposed materials of compostable degradable materials, the original survival rate and biological properties can reach more than 90%.
The above is the EU's evaluation standards and certifications for compostable degradable plastics introduced by Compostable package suppliers, which are different from American standards and Australian standards.