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  1. RonJon1190

    IR annealing Polycarbonate

    I am looking to stress relieve injection molded lenses to reduce stress cracking issues. I have read that with a mid range IR heater, you should heat the PC to between 125-130 C and hold there for 60 s per 1/8in of wall thickness. I have done this, and have gotten no results. I am afraid to go...

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