common rosin的意思|示意

It was affirmed in the Productive course that the common rosin possessed the action of "thermal bleach".

在生产过程中证实，普通松香有“热漂白”的作用。

Rosin sizes is a common sizing agent of paper, the content of free rosin acid is low in common rosin sizes, so the sizing effect is bad.

松香胶是造纸常用的施胶剂，普通松香胶的游离松香含量低，因此，施胶效果不好。而分散松香胶中游离松香含量高，分散越好，施胶的效果越佳。