Polyvinyl alcohol is a strong hydrophilic and active organic compound that is commonly used as a binder in paper and printed matter. Polyvinyl alcohol has excellent plasticity and fluidity, and can be used for the coating and packaging of printed matter. Due to its excellent physical and chemical properties, polyvinyl alcohol has been widely used in colorful printing. And provides a variety of roles in colorful printing.
1. Fix the paint
Pva can be used as a paint to fix colored pigments and prevent them from spreading on the paper. At the time of printing, PVA can be mixed with pigments to form a pigment paste, which is then printed directly on paper by a printing press. This printing method can ensure the accuracy and consistency of the color. At the same time, through the adsorption of polyvinyl alcohol and paper, the pigment can be firmly attached to the paper and is not easy to fall off.
2. Enhance the toughness and brightness of printed matter
In colorful printing, polyvinyl alcohol can also be used as a coating, which can greatly enhance the toughness and brightness of the print. Through the coating treatment of PVA, the printed matter can better resist the influence of external factors such as water and wiping. In addition, the coating of PVA can make the print more beautiful and increase the decorative effect of the print.
3. Other advantages
Pva has other advantages. First of all, polyvinyl alcohol is non-toxic, tasteless, safe for human body, and can be used with confidence. Secondly, polyvinyl alcohol can remain stable in a high temperature and high humidity environment, and will not lose its physical and chemical properties due to environmental changes. Finally, the price of polyvinyl alcohol is relatively low, and the use cost is low.
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