Tannin has important application value in leather-making, as a major component of the vegetable tannin extracts. The extraction methods of tannin were introduced, and their development prospects were put forward.%单宁是制革用栲胶的主要成分，具有重要的应用价值。简要介绍了植物单宁的提取方法，并对其发展做了进一步的展望。
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