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What is the back of the mirror?

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Focus on Chemist Since 1984

What is the back of the mirror?

Release time:
2018/07/17
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The back of the previous mirror was made of silver or mercury. Nowadays, the mirrors are all evaporated by aluminum. The aluminum wire is heated by a passing tungsten wire in a vacuum to form aluminum vapor, which is deposited on the glass to form an aluminum film.