sulphur green blue

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sulphur green blue
Posting date : Dec 02, 2009
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32-
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Blue-gray powder. Slightly soluble in water, not soluble in ethanol and benzene, soluble in sodium sulfide solution was olive. In the concentrated sulfuric acid in the dark blue and diluted into a dark blue precipitate. Staining material in an alkaline sodium hydrosulfite solution was dark yellow, oxidation can return to normal color; in sodium hypochlorite solution, all faded; case of concentrated sulfuric acid into a dark blue. Uses: Suitable for cotton, linen, viscose fiber and fabric dyeing. Leveling and the exhaustion of both good and slow oxidation. Low temperature (70 ℃) stain color yield deep and bright, the temperature is too high, shade grayed out. For polyvinyl alcohol stain, leveling poor color yield shallow depth than cotton, darker shade

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