Factors Affecting the Color Saturation of Water-based Ink Flexo Printing Products
Release time:
2024-04-01
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The factors that affect the color saturation of water-based ink flexo printing products Flexo printing has the advantages of bright colors and full colors. It is widely used in the field of packaging and printing. There are various types of inks used in flexo printing. But in the actual printing process, sometimes using the same water-based ink, but can not get the same color saturation, why is this? The color saturation of printed products is to rely on the ink layer on the printing of light absorption and scattering to reflect, mainly covering power and tinting strength of two parameters. These two parameters are related to the inherent characteristics of the ink and some factors in the printing process. We will briefly analyze these factors from several aspects.
Intrinsic factors of ink
The color saturation of ink in printed matter mainly depends on its absorption and scattering of light. The composition and intrinsic properties of the ink play an important role in affecting the color saturation of printed products. Water-based ink is mainly composed of water-soluble acrylic resin and pigments, additives, etc., in which the role of the pigment is color. Some of the inherent characteristics of the pigment will affect the hiding power and tinting power of the printed product, which will directly affect the color saturation of the printed matter. Different particle size, shape and distribution will change the color of the pigment, and the strength of its hiding power and coloring power will also change. Generally speaking, the hiding power of pigments has a certain relationship with the refractive index and its particle size. When the pigment particle size is small. Less hiding. As the particle size increases, the hiding power increases, and when the particle size increases to a certain extent, the hiding power decreases. The fluctuation of pigment tinting strength also depends on the particle size, shape, particle size distribution, crystal structure, etc., when the particle size of the pigment decreases, its tinting strength is enhanced. When it exceeds a certain limit, its coloring power will weaken with the decrease of particle size.
The acicular particles have a larger specific surface area than the spherical particles. Its absorption and scattering ability is stronger. Therefore, its coloring ability is also stronger. Therefore. Pigment particles have a non-negligible effect on the color saturation of prints. So in the manufacture of water-based ink. The pigment particles (including particle size, shape, etc.) must be carefully selected.
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