Mirrors are commonly made of glass with a smooth, polished surface that forms images by the reflection of rays and light. Mirrors are exceptionally useful and practical devices and are commonly used in every area of daily life. Production The original method of making glass mirrors consists of depositing a coating of metal, mostly silver, on the surface of clear or body-tinted glass. A layer of copper, which is in turn protected by a painted backing, usually protects this deposit. The silver gives the mirror its reflective properties.
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