• disco
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        6 days ago

        This might seem like a dumb question but couldn’t you burn the color out during the recycling process?

        • eleitl@lemmy.zip
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          6 days ago

          It’s metal ions. You can compensate for iron with manganese, but you’ll still get a grayish glass with reduced transmission.

          • disco
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            6 days ago

            This makes sense. Thank you