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nature : also known as plastic leather. The use of leather (hides pigskin) and the scraps of Decocting scraps gelatin derived from glia. A film and rubber, yellow to brown, translucent or opaque. Nature and gelatin similar, but lower quality, contain more impurities. Offset system for copying, adhesive resistant paste, matches emphasize medicine, wood laminated materials, and for silk, cotton yarn, cotton fabrics, straw hats and sizing of Coated Paper, optical materials, the wax coating.
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