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How to tell PP from PET?

06 June 2018

Identifying PP (Polypropylene) from PET (Polyethylene terephthalate) just by looking can be difficult. When it comes to recycling how do you recognise PP from PET?

PP is matt in colour whereas PET tends to be glossy.  Another way to tell the materials apart is to place them in a container of water:  PP will float, whereas PET will sink. ‚Äč

Polypropylene Polyethylene terephthalate
  • Matt in colour
  • Floats in water
Interesting Fact about PP: Recycled in food containers, compost bins, automotive components
  • Glossy in colour
  • Sinks in water
Interesting Fact about PET: Recycled in clothes, carpet, insulation materials