The Optical Brightener DT is used to polyester, polyester-cotton blend whitening, as well as nylon, acetate fiber and cotton ble Optical Brightener DTAppearance: light yellow dispersion fluorescence intensity (as standard), the sub-100Shade Similar to standard fineness (> 4um particle number) were ≤ 3 This product is a non-ionic, non-ionizing groups can be acid and alkali levels PH = 2-10, ...