Part of the water is used to rinse the silicate from the graduate. 一部分水要用来冲洗量杯中的硅酸钠。
The sodium silicate makes the cork stick to the mold surface and also helps to withstand the charring action of the molten lead alloy. 硅酸钠能使软木粉粘结在模具表面，而且还有助于软木粉耐受熔融铅合金的碳化作用。
