What is the effect of the ink adjuvant on the quality of the coating?
(1) The role of ink diluting agent, commonly used ink diluting agents are white ink, Weili oil and bright light paste. In the white ink, there are obvious silt particles, which are not tightly bound to the binder. After printing, these pigment particles will float on the surface of the paper and hinder the adhesion. Verite oil is made by rolling aluminum hydroxide and binder. Since aluminum hydroxide is light, it tends to float on the surface of the ink layer after printing. When the film is covered, an adhesive layer is formed between the adhesive and the ink layer, resulting in stickiness. Can not close or blistering. The glossy pulp is made of resin, dry vegetable oil, drier, etc. The texture is delicate and the film is bright. It has similar properties with the conjugated multi-bond terpene resin as the main component, and they have good affinity and can firmly adsorb the polypropylene film on the ink surface.
(2) dry oil adding. The addition of dry oil to the ink can speed up the drying of the print, but the dry oil adds a large amount of oil, making it easy to form a smooth, glossy, low-interfacial layer on the surface of the ink layer. It is difficult for the adhesive to wet and infiltrate and affect the fastness of the film. Therefore, To control the amount of dry oil added.
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