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Old 2nd Jun 2020, 9:45 am   #1585
stevehertz
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Join Date: Sep 2011
Location: Rugeley, Staffordshire, UK.
Posts: 8,809
Default Re: The Audiophoolery Thread.

Quote:
Originally Posted by Radio Wrangler View Post
Cadmium mining tailings also got in on the act. Cadmium just has a terrible history of pollution from beginning to end.

Chromium doesn't get off easily, a proportion always turns into the valency-6 form which is also banned. As there is a small amount of residual chromium in cement, they add an agent to oppose this. The agent has a limited life and so bags of cement now have use-by dates printed on them.

David
David, are you the main data base for Wikipedia?
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