Retrobright
Process for removing yellowing from ABS plastic / From Wikipedia, the free encyclopedia
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Retrobright (stylized as retr0bright or Retrobrite[1]) is a hydrogen peroxide-based process for removing yellowing from ABS plastics.
Yellowing in ABS plastic occurs when it is exposed to UV light or excessive heat, which causes photo-oxidation of polymers that breaks polymer chains and causes the plastic to yellow and become brittle.[2]