This International Standard specifies procedures and requirements for the identification and labelling of

plastics, and products made from plastics, that are suitable for recovery through aerobic composting. The four

following aspects are addressed:

a) biodegradation;

b) disintegration during composting;

c) negative effects on the composting process and facility;

d) negative effects on the quality of the resulting compost, including the presence of high levels of regulated

metals and other harmful components.

This specification is intended to establish the requirements for the labelling of plastic products and materials,

including packaging made from plastics, as "compostable" or "compostable in municipal and industrial

composting facilities" or "biodegradable during composting" (for the purposes of this International Standard,

these three expressions are considered to be equivalent). The labelling will, in addition, have to conform to all

international, regional, national or local regulations (e.g. European Directive 94/62/EC).

NOTE The recovery of compostable plastics through composting can be carried out under the conditions found in

well-managed composting plants, where the temperature, water content, aerobic conditions, carbon/nitrogen ratio and

processing conditions are optimized. Such conditions are generally obtained in industrial and municipal composting plants.

Under these conditions, compostable plastics will disintegrate and biodegrade at rates comparable to yard trimmings, kraft

paper bags and food scraps.