Optical Brightener, Sulphur Black, Carbon Black manufacturer / supplier in China, offering Sulphurized Black Bn 200%/220%/240%/250% Used for Flax and Viscose Fiber, Sulphur Dye Sulphur Black Bn C. I. Suphur Black 1 in Digital Printing Dyeing, Sulphur Dyestuff Sulphur Black Brr 200% Textile Dyes Usage and so on.
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