I urge you to avoid using plastic materials whenever you can, but if you find that you are unable to do so, a classification system called the Resin Identificat…
Plastic codes, by the numbers | Center for Science in the Public Interest
Plastics – Resin Codes. What do they mean? - 2EA
Plastics Codes 1 to 7 – what do they mean? - Bunzl Forté
Resin Identifications Code | Environmental Center | University of Colorado Boulder
Table of Plastic Resin Identification Codes Sheet of Different Plastic Materials Garbage Waste Sorting Recycling Signs Stock Vector - Illustration of package, material: 178654262
Common Plastic Types
Resin Identification Code (RIC) | Environmental Claims on Packaging: A Guide for Alameda County Businesses