Optical Brightener VBL Physical and Chemical Properties:
It is a typical representative product of bis(triazineamino) fluorescent whitening agent. It is soluble in 80 times soft water and has anionic properties. The acid and alkali resistance is pH=6~11, and the dye bath pH is 8~9. should.
In an acidic solution, the fluorescence gradually weakens due to the increase in acidity, resulting in yellowing. It can withstand hard water to 300ppm, free chlorine to 0.25%, not tolerant to metal ions such as copper and iron, stable to fusogenic powder, but not resistant to high-temperature baking. It can be used in the same bath with anionic surfactants or dyes, non-ionic surfactants, and hydrogen peroxide. The fluorescent hue is cyan light purple (blue-violet). Fluorescent whitening agent VBL should not be used in the same bath as cationic dyes, surfactants, and synthetic resins.

Optical Brightener VBL Product Usage:
1. Used for whitening cotton and viscose white products, as well as brightening light-colored or printed products, general light fastness, good affinity for cellulose fibers, general levelling, printing, dyeing, pad dyeing and Suitable for printing paste.
2. It can be used for whitening vinylon and nylon products.
3. Used in the paper industry, the whitening of pulp or paint