This SAE Recommended Practice provides a system for marking plastic parts to designate the type of material from which the part was fabricated. The purpose of this document is to provide information to facilitate the: a.) Selection of materials and procedures for repairing and repainting plastic parts, and b.) Collection and handling of parts for subsequent recycling.
SAE J1344-1997 Referenced Document
ISO 1043-1:1997 Plastics - Symbols and abbreviated terms - Part 1: Basic polymers and their special characteristics
ISO 1043-2:1988 Plastics; symbols; part 2: fillers and reinforcing materials
ISO 11469:1993 Plastics; generic identification and marking of plastic products