Adding anti-dye agent to dye-resistant printing paste

Anti-staining printing paste to add anti-staining agent. There are many types of resists, including reducing agents, oxidizing agents, acidic compounds, basic compounds, polymeric film forming materials, zinc oxide powders, and clays. Can be selected according to the nature of the color dye. For example: general reactive dyes react with cellulosic fibers in alkaline media, and can be used as an anti-dye agent for acidic substances. Temporary soluble vat dyes and aniline black must be colored under the action of acid and oxidant. Reducing agent and alkaline can be used. Substances used as anti-dye agents, vat dyes on the contrary, need to use acid and oxidants to prevent dyeing; insoluble azo dyes are based on the coupling of their different liveness and use of acid or sodium sulfite and other anti-dying. Zinc oxide powder is a mechanical anti-staining agent that has the effect of covering or forming a film to prevent the dyeing of fibers.

Commonly used in the production of anti-dyeing printing ground color dyes are veramin blue, aniline black and phthalocyanine dyes, and a wider range of anti-dyeing printing applications in the Vermillion Blue color, China's dark blue color floral fabrics used in this method, its Printing process is simple, bright colors, fast, low cost.

Vanadine blue salt VB is less reactive with naphthol AS and must be used in near-neutral media (PH=7~8). Therefore, acid salts such as aluminum sulfate and other acidic substances are used as alkali salts. The anti-dye agent can prevent the coupling reaction and achieve the purpose of anti-dyeing and printing. The dosage of aluminum sulfate depends on the size of the pattern and the depth of the engraving. The amount of aluminum sulfate is too much and the drying time is too long, which will cause the fabric to be brittle.