....no chemicals are used, and they are 100% compostable and biodegradable. These plates will hold up in the refrigerator and microwave, and can be reused when used with dry foods. Because they are made from 100% natural materials, each plate is like a snowflake; unique in its patterns, colors and variations. They make a beautiful addition to any home, party, wedding, BBQ or event, and you can feel good about disposing them. Add them to your compost bin and in 60 days, they will again become a part of the earth.