Silvered mirror is manufactured by plating silver and copper layers on the surface of quality float glass through chemical deposition and replacement method and showering primer on the surface of the silver and copper layers as the protection of the silver layer. Being made through chemical reaction, chemical reaction between the glass and the air or moisture or other substances in the environment may occur, giving rise to the peeling or flaking of the lacquer or silver layer, so it generally requires critical production and processing technology, environment, temperature and quality.