Silvering is the
chemical process of coating
glass with a reflective substance. Glass mirrors were first coated by molten metal. Later,
tin amalgam was used. The
mercury contamination by this process made it necessary to switch to the more expensive
silver coating, in order to create a
mirror. Today,
sputtering, powdered
aluminium or other compounds are more often used for this purpose, although the process maintains the name "silvering".
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