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... s juice 3 cups, red salt 1 bowl, water 6 bowl. When the ratio is made into a tanning liquid stock, a stock solution is diluted with water seven times and then soaking the animal skin, and the raw liquid is gradually increased every day. At the same time, the animal skin is repeatedly turned over and the skin that is the end product is finally better than the previous one.
This discovery also opened Yan Mo's ideas. After studying the kind of grass juice, he began to try to make variou ...
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