Note that fluorescent brighteners must have these three requirements

In general, whiteness has always been considered as a sign of perfect washing.

However, the washed white fabric has a very pale yellow hue, which is caused by the relatively defective light in the blue wavelength band in the reflected light under the influence of light, heat, and the like after the plant is stained.

The fluorescent whitening agent for detergents has an absorption wavelength of 300-400 nm and an emission wavelength of 400-500 nm. The blue or violet-blue wavelength is just a complementary color to yellow, and detergents containing fluorescent whitening agents make After washing fabric whitening, can achieve the best whiteness, while increasing the vividness, double bright colors.

Excellent fluorescent brighteners should meet the following requirements:

1. Has good affinity to fiber;

2. Stability and fastness to oxygen, light and chlorine. Excellent chlorine bleach resistance, oxygen bleaching agent and resistance to strong acid and alkali, good compatibility with bleach, and not easy to be decomposed;

3. With solubility and good dispersion in the powder and slurry, to avoid uneven whitening and stain phenomenon.