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PROCESS FOR PREVENTING THE SOLUTION OF LEAD FROM PLUMBIFEROUS GLASS DISHES BY PROTECTING THEM WITH GLASS COVERING WITHOUT LEAD CONTENT

机译：通过在无铅的情况下用玻璃覆盖层进行保护来预防铅化玻璃溶液中铅的方法

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摘要

Two glass melts are joined together so that the heat expansion coefft. between the outer and inner layer is +/- 8 x 10 power (-7)cm/ deg.C.

机译：将两个玻璃熔体连接在一起，以达到热膨胀系数。外层和内层之间的距离为+/- 8 x 10幂（-7）cm /℃。