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Indigo powder
Property and usage:
It is a kind of blue powdery reducing dye, and is the initial product of indigo. It is produced by stoving the filter cake from the former section. It is insoluble in water, ethanol and ethyl ether, but soluble in melt benzoyl oxide. It is mainly used in the dyeing and printing of cotton fiber, and is the special dye for jean cloth. It can also be processed into food dye and biochemical agent.
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Quality index:
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Appearance
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Homogenic dark blue powder
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Colour light
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Similar as the standard sample
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Content
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≥ 94.0%
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Moisture content
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≤ 1.0%
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Strength
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Equal to 100 percent of the standard sample
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Degree of fineness
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Passing through the 60# screen mesh ≥ 95%
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PH value
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7
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Package: In the sealed plastics--lined iron drums(or plactic drums) of 25kg net each.
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Note: The packing of above products can be customized according to the requirement of client. |
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