1 Sorting and Shaving
工業科技

        After chrome tanning it is common to allow excess chrome liquor to drain off the wet-blue,and to stand them in a damp condition for a day or more. Further fixation of chrome and setting of the wet-blue fibers occur. Where a flat leather is required,the we......（本文共 11336 字, 3 張圖）     [閱讀本文] >>