What is the color printability of ink?

In printing, the ink color of color or non-color prints is not based on the appearance and color properties of the ink, but on the basis of the ink film layer solidified on the surface of the printed sheet . The color of the ink mainly depends on the color of the pigment used and the properties of the binder, while the color displayed by the ink film is related to the intensity and wavelength of the irradiated light, the photochemical properties and surface properties of the surface of the printing material, and the thickness of the ink layer. closely related.

The color of the ink used for four-color (or three-color) plate color offset printing, in theory, should be the complementary color of the color filter used in the color decomposition of the original manuscript. However, the three primary color have the defects of impure coloring phase, dim brightness, and low saturation. Moreover, under different paper types and properties, the solid density value of the gray balance is different. In the printing process, the color displayed by the ink in the wet state and the dry state of the ink film is different . Therefore, it is particularly important to choose the appropriate printing ink to meet the color printing suitability of the ink . This not only has practical technical significance for reproducing the tone and color of the original manuscript, but also is very important for showing the artistic effect of printed matter. In the current ink product technical standards , there is no numerical index listed for the color, and only the "standard sample" is used as the benchmark.