As of now, Resin Identification Coding System is best way to categorize and identify plastics. It is as below :
1 PET - Polyethylene Terephthalate
2 HDPE - High Density Polyethylene
3 PVC - Polyvinyl Chloride
4 LDPE - Low Density Polyethylene
5 PP - Polypropylene
6 PS - Polystyrene
7 Others - PMMA (Acrylic), ABS, PC etc.
End product made by using particular type of plastic would have its symbol on it so that it becomes easy to identify its type.
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