Taking to use Chemical Vapor Deposition (CVD) technics similar as normal silver mirror processing, and apply to the palladium chloride instead of regular copper as the metal protection layer, also using special lead-free paints as the final protection.Due to this silver mirror is not containing copper, protective paints are lead free, it's also called copper-free environmentally-friendly mirror. Comparing with the traditional silver mirror, this copper-free mirror gives the much better reflectivity and durability with more environmentally-friendly. Widely used the interior decoration and some scenarios with very high environmental standards.