滴定靛蓝和保险粉

2015-01-15 09:04  下载量：7

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Indigo is a so-called vat dye, which means that it needs to be reduced to its water soluble leuco-form before dying. The reduced form is absorbed into the fibres, and when oxidized back to its blue form it stays within the fibre. Earlier the reduction and dyeing was done with fermentation. Nowadays, the most of the reduction has been done chemically by sodium dithionite.

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优莱博技术（北京）有限公司
白金会员 | 第18年
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