The pickled pelt or bated hides were pretreated separately with glyoxylic acid,amino compounds and dicyandiamide resin etc.,then tanned with less chrome.

• 用氨基化合物,乙醛酸和双氰胺树脂等分别处理浸酸裸皮的软化裸皮后进行少铬鞣制。