ASTM D6400-99 pdf free.Standard Specification for Compostable Plastics. ASTM D6400 covers plastics and products made from plastics that are designed to be composted in municipal and industrial aerobic composting facilities. This specification is intended to establish the requirements for labeling of materials and products, including packaging made from plastics, as "compostable in municipal and industrial composting facilities." 4. Classification 4.1...