The wax molds are dipped into waterglass solution, with surface coated by the solution.

将蜡件组浸入含有水玻璃等涂，涂上涂。

This is mainly because some manufacturers have adopted the great containing alkaline waterglass glue or adhesive.

主要是分厂家采用了含碱性很大水玻璃胶或淀粉胶所致。