FWA VBL by Dalian Richfortune Chemicals is an anionic stilbene triazine tetra-sulfonic sodium class optical brightener available in light yellow uniform powder form. It can be soluble in soft water and shows resistance to acid at pH 6-11. It is stable to rongalite and can be used along with anionic surfactant or non-ionic surfactant in one bath. It is compatible with polyvinyl alcoholic and polyamide fiber. FWA VBL is suitable for coating applications. Recommended dosage level in dyeing is 0.08-0.3%.
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FWA VBL properties
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