Strong anti-oxidation performance, corrosion resistance is not easy to blackenTested, in five percent concentration of hydrochloric acid, more than 95 hours to react (ordinary copper-free silver mirror less than 30 hours to react) antioxidant performance than the traditional copper-free silver mirror to enhance the three times, is the ordinary silver mirror 9 times, aluminium mirrors 27 times, the mirror surface is more translucent. Multi-layer protection, more durable.