Water-based pigment ink use their skills

Water-based inks and other printing inks but also by the same pigments, binders and additives ink composition. Selection should pay attention to water-based ink pigment pigment alkali resistance, relative density and color match. Sometimes the first pigment made into an aqueous dispersion of pigment particles pigment paste which is then mixed with binders and additives dispersed made into water-based ink.
Precautions pigment based ink pigment selected alkali resistance; pigment ink color feature is given to meet the requirements of color printing materials. The water-based inks are mostly linked alkali-soluble binder resin, the ink viscosity and requires precise control of the pH value, pH value control in general between 8.0 and 9.5. When the pH is higher than 9.5, too alkaline, will reduce the viscosity of the ink, the drying speed is slow, water resistance is deteriorated; while when the pH is lower than 8.0, the alkali is too weak, the ink viscosity will rise , easy to dry the ink will cause dirty version, paste version and blistering and other defects. So we choose to use alkali-resistant pigments to be good pigment.Plasticizer for PVC
The relative density of the pigment; aqueous ink pigment relative density of disparity from each other, the relative density of the pigment is easy to float on, for example, often with dark green water-based ink, carbon black, phthalocyanine blue, chrome yellow pigments such as lead with color, easily generate floating color, blur, precipitation and other phenomena; pigments relative density is too large, then its easy to precipitate agglomeration destroy the stability of water-based inks, such as iron oxide red, chrome yellow, etc., often due to agglomeration can not stir open.Impact modifier for PVC
Pigment combinations; different fillers its physical and chemical properties, such as relative density, pH, polarity and crystallization conditions, etc. are not the same. Therefore, the ink in the manufacturing process, if using a variety of pigments, fillers, often because of large differences in physical properties, even if it is strongly stirred only temporarily dispersed in the ink, a long storage time often occur pigment sedimentation, floating and so on. Therefore, in the choice of the pigment ink system, some type of filler should be minimized. But sometimes in order to achieve the hue and performance requirements, had to choose between several pigments.