'''Resin identification codes''' are [[symbol]]s identifying the type of [[plastic]] an item is made of. They were created in 1988 by the Society of the Plastics Industry, Inc to make the [[recycling]] of plastics easier.<ref>http://www.americanchemistry.com/s_plastics/doc.asp?CID=1102&DID=4644</ref> | '''Resin identification codes''' are [[symbol]]s identifying the type of [[plastic]] an item is made of. They were created in 1988 by the Society of the Plastics Industry, Inc to make the [[recycling]] of plastics easier.<ref>http://www.americanchemistry.com/s_plastics/doc.asp?CID=1102&DID=4644</ref> |