The method of sulfomethylation modification of bayberry tannin extract was investigated.

研究了毛杨梅栲胶的磺甲基化改性方法。

Using the syntan to pretan vegetable-tanned sole leather ,the quantity of tannin extract can be reduced in vegetable tanning.

该合成鞣剂用于植鞣底革的预鞣,可减少植鞣时栲胶的用量。