Resin identification coding
system
Resin identification coding
system is introduced as a means of helping consumers and recyclers to identify
the type of plastic resin from which a bottle or a container is produced from.
Manufacturers follow the coding system by placing a number or SPI code on each
plastic product and the code are usually molded into the base of the products. For
example, plastics marked with an SPI Code of 1 are made with polyethylene
terephthalate (PET).
