In typical terms, the word biodegradable from compost has a different meaning. Although biodegradability refers to the natural disintegration of an object into its basic components, "composting" specific requirements, these basic components are organic compounds. Many plastics companies have begun releasing plastics that claim to use "compostable" forms, usually listed as a component of corn starch products. However, these statements are questionable.
Self-defined compost, combined with the operation of biodegradable plastics industry, is able to carry out biodegradation of materials, which can not be distinguished in composting field and other visual, and decomposes into carbon dioxide, water, inorganic compounds and biomass at the same rate with known compostable materials.
It must be pointed out that "carbon dioxide, water, inorganic compounds, and biomass" includes each substance in the known universe, releasing plastic companies to make compost from plastic bags, appliances, etc. used by any material available to them. "Inorganic materials" are included in the exclusion of compost, or humus, which are pure organic materials and are considered high-end products. In fact, according to the ASTM definition, the only criterion required for a plastic to be called compostable is that it appears to go at the same rate as anything else, and what has been known is that compost is traditionally defined.