Basic properties of color inks

The chemical structure of the object itself has the characteristics of selective absorption, transmission, and reflection of visible light waves from the space, and therefore it is responsible for various colors, that is, the selective absorption and reflection of white light components by the object. result. The color of the object seen by the human eye absorbs light in the white light complementary to it, and reflects or transmits the remaining color light. Therefore, the hue produced by the color material is the subtraction of some color light from white light. Combine the remaining shades of light to show the results.

All colored materials, which can be used for painting, are called pigments, and the results of mixing or superimposing a variety of pigments are called subtractive methods. Color ink is also a color material that produces color prints. Whether the color inks are blended, mixed, or overlaid with a color separation printing, the prints are rich in color and vivid in color. This follows the law of color reduction. The various color filters used in the color separation work of the photoengraving system are also examples of the implementation of the principle of subtractive coloring.

There are three basic colors in the colorant, and not in other colors. The three primary colors of color materials, also known as subtractive three primary colors, are fundamentally different from the three primary colors of color light. The three primary colors of visible spectrum are red, green, and blue. The three primary colors of the material are magenta, yellow and cyan. This name cannot be confused. The three primary colors of magenta, yellow, and cyan materials have the property of absorbing and subtracting light of a certain color in white light. Therefore, in the subtractive color method, magenta can be referred to as reducing green (-green) and yellow as subtracting blue (-). Blue), Blue is reddish (-red). By measuring the color of the two sets of three primary inks, one can understand the range of colors that the three primary inks can produce and their degree of color bias. If you use a spectrophotometer, you can obtain a scoring photometric curve, and their characteristics can be fully expressed.

The color intensity of the ink is a very important parameter, because the color intensity determines the range and depth of the color that can be used, and the tendency of the colors to be mixed after overlapping is mixed. For example, the color intensity of the yellow ink and the blue ink will determine whether the resulting green color is yellow or green.

Therefore, it is also important to control the monochromatic intensity of each color ink and to grasp their hue. It is particularly important to measure the color intensity of the first color printing ink on a monochrome printer. Densitometers should be used to ensure the correctness of the first color ink. The color intensity of the second color ink can be estimated by checking the color tone produced after overprinting. For example, the yellow ink is printed first, and the color intensity is also appropriate. After the green color is overprinted, it can be checked with the green field printed on the yellow and green overlays. Cyan intensity is correct, so as to ensure that the tone after overprinting is consistent.