而且还要检查一下镜子后部水银处是否有内衬纸和背板，因为没有背板就是不合格的，而且没纸也不行，这样是会把水银磨掉。
But also to check whether the mercury mirror rear inner liner and a backplane, because there is no backplane is unqualified, and no paper is not good, so is the mercury will wear off.
在温湿度发生变化时，这种隔板纸可能会有较大颗粒散发，从而造成洁净厂房洁净度测试不合格。
Changes in temperature and humidity, the diaphragm paper may have larger particles distribution, resulting in clean room cleanliness test is unqualified.
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