... the fabric of cotton fiber, nylon, etc, taking on excellent whitening effect on artificial fiber, polyamide, vinylon, International authenticationISO9001,BV etc ... patentsOptical brightener CXT has less solubility than VBL and 31#, it can be soluble in hot water and form about 10 ... % solution. The solution should be used immediatly when it is ready and avoid sunlight. The dosage used is 0 ...