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nature : a normal pickling not overstaffed state surface should feel shy, with a rude hand, the white surface. But if inflation slippery surface shiny hair, namely acid swollen. The main reason is acid leaching of acid overload, no salt or salt shortage. Pickling the Paper case of water, and also have acid swollen. The timely addition of salt can reduce the swelling. Acid swollen skin not timely remedial salt and continue processing, leather will make the mechanical strength of lower grain easy to brittle fracture.
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