What is resin code? How are resin codes numbered?
The resin code represents the type of polymer used to make the plastic. The resin codes are numbered from 1 to 7. Resin codes #1 to #6 each identify a certain type of plastic that is often used in products. Resin code #7 is a category that is used for every other plastic (since 1988) that does not fit into categories #1 to #6. The resin codes look very similar to the recycling symbol, but this does not mean that all plastics with a code can be recycled.