软木粉是通常情况下小于等于100目的碎软木称为软木粒，大于100目的碎软木称为软木粉。
另一种是把软木粉用200目或更细的筛网进行筛选。
The other method is to pass the powder through 200 or fine mesh screen.
另一种是把软木粉用200目或更细的筛网进行筛选。
The other method is to pass the powder through 200 or fine mesh screen .
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。
The sodium silicate makes the cork stick to the mold surface and also helps to withstand the charring action of the molten lead alloy .
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