古代人们对着水面照见来整理容冠。后来有了铜器,人们把铜的表面抛光制成铜镜。自从有了玻璃以后,人们又利用硝酸银配成一定浓度的溶液,加入适量还原剂如甲醛或葡萄糖,将配制好的溶液倒在玻璃上,硝酸银就被还原成金属银沉积在玻璃板面上,制成了镜子。硝酸银还原的反应过程: Ancient people looked at the water to look at the crown. Later, with the bronze ware, people polished the copper surface into bronze mirrors. Since the glass has been in place, people have used silver nitrate to form a solution with a certain concentration, added an appropriate amount of reducing agent such as formaldehyde or glucose, poured the prepared solution onto the glass, silver nitrate was reduced to metal silver and deposited on the glass surface. On the mirror was made. Silver nitrate reduction reaction process: