The color of the print is overprinted with inks of different hue. The order of the overprinted ink is called the print sequence. According to the permutation and combination principle, four colors (yellow, magenta, cyan, and black) can be printed in 24 different color orders, but only by selecting the printing color sequence that conforms to the rules of overprinting can the color of the printed matter be closer to the original. Make the image clear and clear, and achieve the right balance of gray. However, due to mutual overprinting, defects in the ink itself, and paper quality and other factors, different printing sequences directly affect the quality of the printed matter. Therefore, scientifically and reasonably arranging printing color sequences can only obtain high-quality prints that are correct, soft, rich in gradation, and have the right color tones to meet the needs of customers.
Determine the general principle of printing color sequence: According to the content and characteristics of the original document to determine the color of the print is made of ink with different colors superimposed, the order of overprinting ink is called printing color sequence. According to the permutation and combination principle, four colors (yellow, magenta, cyan, and black) can be printed in 24 different color orders, but only by selecting the printing color sequence that conforms to the rules of overprinting can the color of the printed matter be closer to the original. Make the image clear and clear, and achieve the right balance of gray. However, due to mutual overprinting, defects in the ink itself, and paper quality and other factors, different printing sequences directly affect the quality of the printed matter. Therefore, scientifically and reasonably arranging printing color sequences can only obtain high-quality prints that are correct, soft, rich in gradation, and have the right color tones to meet the needs of customers.
Determine the general principles of printing color sequence:
1, according to the content and characteristics of the original document to determine the printing sequence. Generally, warm-colored prints, such as figure paintings, are first printed in blue, black, and later in print magenta and yellow; prints mainly in cool tones, such as snowscapes and landscapes, are printed in red and printed in blue.
2. Prints, mainly in the form of text and black field, generally use cyan, magenta, yellow, and black in the printing sequence. However, black characters and patterns cannot be printed on the yellow solid because the yellow ink has a small viscosity and the black ink has a large viscosity, which tends to cause an inverse printing phenomenon, resulting in black ink not being printed or printed.
3. Determine the printing color sequence according to the size of the dot coverage area. Under normal circumstances, the network covers a small area of ​​the first printing, outlets cover a large area of ​​the post-print.
4, according to flat screen and field arrangement printing color sequence. When the printed matter has flat screen and on the spot, in order to obtain good printing quality and avoid the problem of dirtiness in the process of paper hand-over, the plain clothes and the bright and thick ink will be printed on the web.
5, according to the model of printing color sequence. Monochrome machines and multicolor machines have different printing conditions due to different overprinting conditions (the former is wet and dry, the latter is wet and wet). Under normal circumstances, the color sequence of the monochrome machine and the two-color machine is alternated between bright and dark colors. Four-color printing machines generally print dark colors first, and then print bright colors.
6, according to the nature of the paper arranged color sequence. The degree of smoothness, whiteness, fiber looseness, surface strength, and ink absorption of various papers are different. For papers with good ink absorption, dark colors are first printed, and bright colors are printed afterwards; for papers with poor ink absorption, bright colors are printed first. , After printing dark color, because bright ink such as yellow ink can cover off the hair, powder and other paper defects. In the hot summer days, when monochrome is printed on white paper, if the paper suffers from uneven moisture content, uneven wrinkles, poor paper surface strength, which causes paper lint and powder off, etc., it may be used to print a water first. Measures.
7. According to the brightness of the three primary inks arranged printing color sequence. The lightness of the ink is reflected on the spectrophotometric curve of the ink. The higher the reflectance, the higher the lightness of the ink. The order of brightness of the three primary colors is yellow> cyan> magenta> black.
8. According to the transparency and hiding power of the three primary colors, the printing color sequence is arranged. The transparency and hiding power of the ink depend on the difference between the refractive index of the pigment and the binder. The ink with strong hiding power has a greater influence on the color after overprinting, and if the printing is not easy, the correct color cannot be displayed, and a good color mixing effect cannot be achieved. Therefore, in general, inks with poor transparency are printed first and inks with strong transparency are printed afterwards.
9. According to the ink's dryness, arrange the printing sequence. Practice has shown that yellow ink is almost twice as fast as magenta, and magenta ink is twice as fast as blue ink. Black ink is the slowest. Dry slow ink should be printed first, fast dry ink after printing. The monochromatic machine is overprinted to prevent vitrification and is generally printed with yellow to accelerate the drying of the conjunctiva.
10. Determine the printing color sequence according to the viscosity of the ink. The monochromatic machine superimposes the second color after the first color is dry, and the multicolor machine is wet and wet overprinting. Therefore, the viscosity of the ink and the amount of ink should be controlled. The ink with a large viscosity is printed first, and the ink with a small viscosity is printed. India.
11, according to the dark, light-colored arrangement of printing sequence. In order to make the printed material have a certain degree of gloss, when encountering the situation of printing a light color, the dark color is printed first and the light color is printed later.
12. Determine the printing color sequence according to the fitting features. Two-color machine printing four-color printing should be as close as possible to select the two-color tightly fitting the first printing, fitting requirements are not high after the two-color printing.
Special requirements for printing color arrangement
1. When printing securities, the pattern is usually printed first, and the pattern, text and numbers printed afterwards.
2. When copying manuscripts of a type of color print, the color sequence of the printing should be as consistent as possible with the color registration sequence.
3, New Year pictures, calendars, etc. have a type of printed borders, spot color border is usually the last printed.
4, the need to use the India printed matter printed matter, the color order of the printed matter is generally the opposite of the color sequence of the table printing.
5, there are polishing, bronzing (calcined aluminum), film requirements of the printed matter, the process is generally the first printing color ink, after the polishing, bronzing and film. However, for some of the special requirements of the printed matter, the need to add other colors on the aluminized, the above process will change, and at the same time we must pay attention to the adhesiveness of the ink should not be greater than the adhesion of the printed aluminum and printed Ink adhesion to anodized aluminum.
6. When prints are printed with gold or silver ink, gold and silver inks should be placed on the final print because of the low adhesion of gold and silver inks. If gold and silver inks have texts and patterns, they should be printed separately.
7. The superiority of the last printing of yellow ink in four-color printing. 1 Since the yellow ink has good transparency, arranging printing in the last color facilitates sufficient white light to enter the upper and lower ink layers to obtain vivid and bright colors, which is conducive to better color reproduction of printed materials. 2 yellow ink has a faster drying performance, but also has a larger printing area. The yellow ink is arranged in the last color printing, which can prevent the vitrification caused by the fast drying speed of the yellow ink, and can fully utilize the characteristics that the printing area is large and can oxidize the conjunctiva very quickly, covering the surface of other ink layers. Make the print have a certain degree of gloss.
8, in short, in the specific printing process, according to the print quality requirements, in accordance with the law of overprinting the best choice of the best printing color sequence, so as to avoid weaknesses, control the color deviation, print the most ideal print.
Determine the general principle of printing color sequence: According to the content and characteristics of the original document to determine the color of the print is made of ink with different colors superimposed, the order of overprinting ink is called printing color sequence. According to the permutation and combination principle, four colors (yellow, magenta, cyan, and black) can be printed in 24 different color orders, but only by selecting the printing color sequence that conforms to the rules of overprinting can the color of the printed matter be closer to the original. Make the image clear and clear, and achieve the right balance of gray. However, due to mutual overprinting, defects in the ink itself, and paper quality and other factors, different printing sequences directly affect the quality of the printed matter. Therefore, scientifically and reasonably arranging printing color sequences can only obtain high-quality prints that are correct, soft, rich in gradation, and have the right color tones to meet the needs of customers.
Determine the general principles of printing color sequence:
1, according to the content and characteristics of the original document to determine the printing sequence. Generally, warm-colored prints, such as figure paintings, are first printed in blue, black, and later in print magenta and yellow; prints mainly in cool tones, such as snowscapes and landscapes, are printed in red and printed in blue.
2. Prints, mainly in the form of text and black field, generally use cyan, magenta, yellow, and black in the printing sequence. However, black characters and patterns cannot be printed on the yellow solid because the yellow ink has a small viscosity and the black ink has a large viscosity, which tends to cause an inverse printing phenomenon, resulting in black ink not being printed or printed.
3. Determine the printing color sequence according to the size of the dot coverage area. Under normal circumstances, the network covers a small area of ​​the first printing, outlets cover a large area of ​​the post-print.
4, according to flat screen and field arrangement printing color sequence. When the printed matter has flat screen and on the spot, in order to obtain good printing quality and avoid the problem of dirtiness in the process of paper hand-over, the plain clothes and the bright and thick ink will be printed on the web.
5, according to the model of printing color sequence. Monochrome machines and multicolor machines have different printing conditions due to different overprinting conditions (the former is wet and dry, the latter is wet and wet). Under normal circumstances, the color sequence of the monochrome machine and the two-color machine is alternated between bright and dark colors. Four-color printing machines generally print dark colors first, and then print bright colors.
6, according to the nature of the paper arranged color sequence. The degree of smoothness, whiteness, fiber looseness, surface strength, and ink absorption of various papers are different. For papers with good ink absorption, dark colors are first printed, and bright colors are printed afterwards; for papers with poor ink absorption, bright colors are printed first. , After printing dark color, because bright ink such as yellow ink can cover off the hair, powder and other paper defects. In the hot summer days, when monochrome is printed on white paper, if the paper suffers from uneven moisture content, uneven wrinkles, poor paper surface strength, which causes paper lint and powder off, etc., it may be used to print a water first. Measures.
7. According to the brightness of the three primary inks arranged printing color sequence. The lightness of the ink is reflected on the spectrophotometric curve of the ink. The higher the reflectance, the higher the lightness of the ink. The order of brightness of the three primary colors is yellow> cyan> magenta> black.
8. According to the transparency and hiding power of the three primary colors, the printing color sequence is arranged. The transparency and hiding power of the ink depend on the difference between the refractive index of the pigment and the binder. The ink with strong hiding power has a greater influence on the color after overprinting, and if the printing is not easy, the correct color cannot be displayed, and a good color mixing effect cannot be achieved. Therefore, in general, inks with poor transparency are printed first and inks with strong transparency are printed afterwards.
9. According to the ink's dryness, arrange the printing sequence. Practice has shown that yellow ink is almost twice as fast as magenta, and magenta ink is twice as fast as blue ink. Black ink is the slowest. Dry slow ink should be printed first, fast dry ink after printing. The monochromatic machine is overprinted to prevent vitrification and is generally printed with yellow to accelerate the drying of the conjunctiva.
10. Determine the printing color sequence according to the viscosity of the ink. The monochromatic machine superimposes the second color after the first color is dry, and the multicolor machine is wet and wet overprinting. Therefore, the viscosity of the ink and the amount of ink should be controlled. The ink with a large viscosity is printed first, and the ink with a small viscosity is printed. India.
11, according to the dark, light-colored arrangement of printing sequence. In order to make the printed material have a certain degree of gloss, when encountering the situation of printing a light color, the dark color is printed first and the light color is printed later.
12. Determine the printing color sequence according to the fitting features. Two-color machine printing four-color printing should be as close as possible to select the two-color tightly fitting the first printing, fitting requirements are not high after the two-color printing.
Special requirements for printing color arrangement
1. When printing securities, the pattern is usually printed first, and the pattern, text and numbers printed afterwards.
2. When copying manuscripts of a type of color print, the color sequence of the printing should be as consistent as possible with the color registration sequence.
3, New Year pictures, calendars, etc. have a type of printed borders, spot color border is usually the last printed.
4, the need to use the India printed matter printed matter, the color order of the printed matter is generally the opposite of the color sequence of the table printing.
5, there are polishing, bronzing (calcined aluminum), film requirements of the printed matter, the process is generally the first printing color ink, after the polishing, bronzing and film. However, for some of the special requirements of the printed matter, the need to add other colors on the aluminized, the above process will change, and at the same time we must pay attention to the adhesiveness of the ink should not be greater than the adhesion of the printed aluminum and printed Ink adhesion to anodized aluminum.
6. When prints are printed with gold or silver ink, gold and silver inks should be placed on the final print because of the low adhesion of gold and silver inks. If gold and silver inks have texts and patterns, they should be printed separately.
7. The superiority of the last printing of yellow ink in four-color printing. 1 Since the yellow ink has good transparency, arranging printing in the last color facilitates sufficient white light to enter the upper and lower ink layers to obtain vivid and bright colors, which is conducive to better color reproduction of printed materials. 2 yellow ink has a faster drying performance, but also has a larger printing area. The yellow ink is arranged in the last color printing, which can prevent the vitrification caused by the fast drying speed of the yellow ink, and can fully utilize the characteristics that the printing area is large and can oxidize the conjunctiva very quickly, covering the surface of other ink layers. Make the print have a certain degree of gloss.
8, in short, in the specific printing process, according to the print quality requirements, in accordance with the law of overprinting the best choice of the best printing color sequence, so as to avoid weaknesses, control the color deviation, print the most ideal print.
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