Fourteen principles that cannot be ignored when determining the color sequence of printing

Fourteen principles that cannot be ignored when determining the color sequence of printing

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Printing color sequence will directly affect the quality of printed products. In order to obtain good copying results, the following principles must be observed:

1. According to the brightness of the three primary colors, the color sequence is arranged: the brightness of the three primary colors is reflected on the spectrophotometric curve of the three primary colors, and the higher the reflectance, the higher the brightness of the ink. Therefore, the brightness of the three primary colors of ink is; yellow > green > magenta > black.

2. Arranging the color sequence according to the transparency and hiding power of the three primary color inks: the transparency and hiding power of the ink depend on the difference in refractive index between the pigment and the binder. The ink with strong opacity has a great influence on the color after the color combination, and it is not easy to display the correct color as the post-printing overprint, and the good color mixing effect is not achieved. Therefore, the ink with poor transparency is printed first, and the ink with strong transparency is printed.

3. Arrange the color sequence according to the size of the dot area: in general, the area of the dot is small, and the area of the dot is large.

4. Arrange the color sequence according to the characteristics of the original: Each original has different characteristics, some are warm and some are cold. In the arrangement of the color sequence, the warmth is mainly printed first black, green, then red, yellow; the cold-based first printed red, then printed green.

5. Arrange the color sequence according to the different equipment: Generally, the printing color sequence of the monochrome or two-color machine alternates with light and dark colors; the four-color printing machine generally prints dark colors and then prints bright colors.

6. Arrange the color sequence according to the nature of the paper: the smoothness, whiteness, tightness and surface strength of the paper are different. The flat and tight papers are first printed with dark colors and the later printed with bright colors; the coarse and loose papers are printed with bright yellow inks. The dark color is printed after the yellow ink can cover paper defects such as paper hair and powder.

7. Arrange the color sequence according to the drying performance of the ink: It has been proved that the yellow ink is nearly twice as fast as the magenta ink, the magenta ink is twice as fast as the green ink, and the black ink is the slowest. Dry, slow inks should be printed first, and dry inks should be printed. The monochromator is anti-vitrification, and generally yellow is printed for rapid conjunctival drying.

8. According to the flat screen and the field arrangement color sequence: when the replica has flat net and the ground, in order to obtain good printing quality, the ground is flat and the ink color is bright and thick. Generally, the flat net graphic is printed first, and the solid structure is printed later.

9. Arrange the color sequence according to the light color and the dark color: in order to make the printed matter have a certain luster and print a light color, first print dark color, then print light color.

10. The green version of the landscape products is much larger than the magenta version. According to the principle of large prints, the black, magenta, cyan, and yellow sequences should be used.

11. Products based on text and black solid are generally in the order of cyan, magenta, yellow and black, but black text and pattern cannot be printed on the yellow solid. Otherwise, due to the small viscosity of yellow ink and the high viscosity of black, reverse overprinting occurs. Causes black to be printed or untrue.

12. For the picture with a small four-color overprinting area, the color registration sequence can generally adopt the principle of large-format color printing after printing.

13. Gold and silver products, because the adhesion of gold ink and silver ink is very small, gold and silver ink should be placed in the last color as much as possible. Under normal circumstances, it is not suitable to use three-fold ink printing.

14. The color sequence of the print should be as consistent as possible with the color sequence when proofing, otherwise it will not catch up with the proofing effect.