Views: 1000 Author: Site Editor Publish Time: 2022-07-27 Origin: Site
1. Bleaching and whitening have high requirements on water quality. Calcium and magnesium ions and rust in hard water will have an impact on the uniformity, whiteness and gloss of the whitening product, resulting in uneven whiteness, dull gloss, and partial hairiness. Yellow and so on. Before adding the whitening agent into the dye vat, it must be fully dissolved and diluted before adding it, otherwise there will be color spots and stains.
2. Brightener products require alkali resistance, oxygen bleaching resistance, chlorine bleaching resistance, high temperature resistance and moderate directness requirements. If the directness is too high, the dyeing will be too fast, white spots will be easily generated, and the whiteness will be uneven; if the directness is too low, the whiteness requirements will not be met. When setting, if the whitening agent is not resistant to high temperature, it is easy to make the product yellow and affect the quality of the product.
3. Conditioning and bleaching cloth requires uniform hair effect, consistent pH value, white cloth surface, and good permeability.
4. During setting, if you stop in the middle, it will cause yellowing of the shaped product, which will affect the quality of the product. Therefore, it is necessary to check the operating condition of the machine and the setting temperature from time to time. If the setting temperature is inconsistent, yin and yang colors will appear.
5. Before it is too soft, it must be rinsed clean and the pH value adjusted, otherwise soft oil spots will appear; generally, the pH value is required to be between 5.0 and 6.0. The quality requirements of the PH value of the cloth surface.