APP Sheepskins and some of other small skins contain large amounts of natural fat. As already mentioned,sheepskins contain up to 30% fat which has to be removed. Excessive amounts of fatty substances in the skin may interfere with uniform penetration of tanni......（本文共 10677 字） [閱讀本文] >>
說明： 本文檔由創(chuàng)作者上傳發(fā)布，版權(quán)歸屬創(chuàng)作者。若內(nèi)容存在侵權(quán)，請點(diǎn)擊