预鞣是指鞣制前的一个预处理，在正常鞣制（主鞣）前，预先用主鞣剂或其他鞣剂对皮作轻度鞣制，以辅助主鞣取得更好鞣制效果。
根据不同的特性作为铬鞣助剂、预鞣剂以及与植物鞣剂结合鞣等用途。
Depending on the different characters, it can be used as the chrome tanning auxiliary and pretanning agent, and in combination with vegetable tanning agents.
将带有某些耐酸基团的树脂用于预鞣时，这类树脂会占据皮纤维间的部分空隙，从而对随后的鞣制工序中皮对铬的吸收产生影响。
When some kinds of resin with acid resistance radicals are used in pretanning process, the part of space in skin fibre is occupied by these resin, so the exhaustion of chrome is improved.
应用推荐