Questions tagged [pigments]

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What's the chemistry behind making colored a PTFE gasket colored?

There are various classes of PTFE gaskets with different color codes orange, brown, light brown, etc. How do they make PTFE colored? Is it some sort of organic dye or some PTFE complex with metals, ...
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what replaced lead-based pigments? [closed]

In the 1960s and before, even black and white letters had some lead from the actual metallic letters used by typesetters -- some rubbed off. Same thing with books printed before 1970 or so and ...