The adjustment of ink hue is an important work before printing, and it is also a very abstract work. There are three primary colors of simple color, yellow, magenta, and cyan can be adjusted to dozens of colors such as red, orange, yellow, green, cyan, blue, and purple. In the actual preparation process, the colors obtained by the three primary colors ink alone cannot be obtained. This is because the pigments and dyes selected by the ink manufacturer cannot achieve the international standard of the three primary colors saturation, color density, brightness, etc. Plus can only be tea gray, not black. Therefore, black ink, white ink, diluent and other inks and additives are inseparable in the actual color adjustment process.

Ink adjustment process

1. Grasp the ink system, color, color saturation, viscosity, fineness and other indicators used.

2. Examine the proofs and customer requirements, process requirements, hue requirements, and ink usage requirements, and have an in-depth understanding of the arrangement of the color sequence of each color group, the number of products, the amount of ink, and the adjustment of the main color.

3. The solubility of thinner and ink resin, temperature deviation and the ratio of thinner are related. If the temperature is high, the thinner should be slow-drying. At the same time, the dissolution effect and volatilization speed also play a very important role in the printing quality of the product, so the appropriate diluent should be selected according to the relevant conditions.

4. Prepare ink and thinner before printing.

5. In the short time of overprinting, it is necessary to use the primary color ink appropriately according to the color matching, and grasp the proportion, according to the sample to adjust the hue of each color group ink, so that the printing car

After the speed is stable, a little adjustment can achieve the proof effect. In normal printing, batch control of the same hue is more difficult for ink adjusters. For example, the amount of thinner added will affect the color effect to varying degrees, which requires the ink adjusters to have a strong sense of responsibility.

Matters needing attention

1. When the color tone meets the requirements, the fewer the color types of the ink used, the easier it is to adjust and control. Do not use multi-color inks if you can use inter-color inks. According to the subtractive color method, the more colors the spot color inks use, the lower the saturation, and the black component will increase accordingly.

2. Confirm the main color of the printed matter and the auxiliary color contained. The main color ink is used as the basic ink, and the other inks are used as the color ink. The basic ink is the main color, and the color ink is the auxiliary. .

3. When blending proofing and sample inks, try to use the same paper as the paper used for printing, because the color of the ink will change with factors such as differences in paper absorbency. Only by maintaining a stable paper quality can we avoid color errors caused by paper differences.

4. Use ordinary white cardboard to make small samples or scrape samples. The thin thickness of the ink layer will directly affect the color of the ink. If the ink layer is thin, the color is light and the brightness is high. Field or network cable, wet press wet or wet press dry, large or small amount of powder spray, the flatness and whiteness of the paper surface, the thickness of the ink layer, etc. will cause the difference in color.

5. To adjust the spot color ink, first adjust the saturated hue of the ink, make a thin sample, confirm that there is no lack of primary and secondary colors, and then adjust the desired spot color with a diluent.

6. Factors that affect the color of spot color inks also include printing process, water volume, ink volume control, speed and printing equipment, etc., should grasp the printing and its laws to ensure product quality.

Mastering the deployment of spot color inks, controlling the amount of ink used, and making full use of the remaining ink, not only can save materials, but also have a corresponding improvement in personal quality and technical level. An excellent ink adjuster plays an important role in the development of new inks, the innovation of colors, and the reduction of ink costs.

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