• ms.lane@lemmy.world
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      9 minutes ago

      Barium glass.

      Leaded glass was only used for the rear of the tube (or amber monochrome displays), the front glass was barium infused for colour CRTs.

    • merc@sh.itjust.works
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      5 hours ago

      Radioactivity and X-Rays are tangentially related, but they’re not at all the same thing.