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镜子背面镀的是什么?

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镜子背面镀的是什么?

最初人们制造玻璃镜时,是先往玻璃上jinjin地贴一张锡箔,然后倒上水银,因为水银能够溶解锡,变成一zhong黏稠的银白seyeti一"锡汞齐"。锡贡齐jinjin地粘在玻璃上,就成为一面镜子。zuo这zhong镜子太费事,而且镜面也不算太亮。现在使用的玻璃镜,是在玻璃面上镀了一层极薄的银层,这层银是利用一个特殊而有趣的化学反应一"银镜反应"镀上去的。早在三百多年前,人们就用"银镜反应"来制作镜子了。近来,还chu现了另一zhong新型的玻璃 ——“铝镜”,它是在玻璃面上用蒸腾的方法"镀"一层极薄的铝而zuo成的。

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