In 1988, the Society of the Plastics Industry developed a resin identification code — a numbering system from 1 to 7 — categorizing different types of plastic. The code is centered in a triangle made of arrows chasing each other. This mark is commonly misidentified as the recycling symbol. Though the system was instituted to “facilitate the recycling of post-consumer plastics,” the chasing arrows graphic is meaningless. Plastic imprinted with the arrow symbol doesn’t indicate that the material is made from recycled content nor that the plastic can be recycled, misleading many.
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