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

将件组浸入含有璃等涂缸中，涂上涂。

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

主要是因为部分厂家采用了含碱性很大璃胶或淀粉胶所致。