• fan0m@lemmy.world
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    5 months ago

    Pulling this straight out of my ass but I think it’s likely to be polycarbonate

    • Twitches@lemm.ee
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      4 months ago

      I worked in optical it’s polycarbonate. Can be a plastic called cr39 or it could be a high index lens if they have a very high prescription generally alcohol won’t hurt it. If the frame is plastic the alcohol could potentially fog the plastic.