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zhejiang widehigh investment Co.,ltd

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optical brightener agent ob
optical brightener agent ob
Specification: OB
Detail: Optical Brightener for Paper OB Name Fluorescence Brightener OB Appearance Light blue powder Chromatic light Bluish white(similar with standard samples) Purity 99%Min Melting Point 198~203ˇăC Fineness >200meshes ...
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