Two-color machine printing four-color product color sequence arrangement

The three primary colors of yellow, magenta, and cyan materials are superimposed on each other according to different proportions and in different color sequences, and they will have more or less different degrees of color cast. Of course, the reasons for color cast are various, such as the technical level of operators. The quality and performance of the ink used, as well as the pressure and rotational speed of the printing equipment. This paper only analyzes the color sequence arrangement and the effect of the four-color printing on the two-color printing machine for reference only.

Color Sequence 1: Black, Yellow, Cyan, Magenta

The first time it was printed in black and yellow; the second time it was printed in blue and magenta. Since the black version mainly serves as a skeleton and supplements, the position of the pattern on the printed sheet is relatively clear, which is favorable for the operator to grasp the size of the printed sheet and facilitate the subsequent printing registration. However, the color of this color sequence after the print is not ideal, low-key part tends to appear tea tone, the screen is boring, grayish, ink is not bright, dull. In addition, when the operator prints the yellow version for the first time, it is difficult to grasp the amount of yellow ink. The large part is not enlarged, the small one cannot be reduced, especially the rubber press, the yellow version is out of print, and the flower version is not easy to find. Cyan and magenta were overprinted and it was too late to find the yellow version lacking in color.

Color Sequence 2: Cyan, Magenta, Yellow, Black

The first impression of cyan and magenta; the second impression of yellow and black. The operator can easily grasp the amount of yellow ink according to the effect of the first printing, and once the yellow version is lack of color at a glance, it is easy to find out the drawbacks of discoloration and lack of color. Of course, this color-sequentially printed product appears old and the color is not bright enough. In particular, the density of cyan and magenta inks is difficult to grasp, especially for night shifts. The effect of workshop lighting is even more pronounced. When printing a print product with a large number of characters, the amount of ink in the character's skin area is not easy to control, and it is difficult to achieve a structured effect.

Color Sequence 3: Black, Cyan, Magenta, Yellow

The first print is black and cyan; the second print is red and yellow. Because the black version of the first printing, the pattern on the paper to play a positioning role, with black screen frame, contouring, in order to continue the next printing process, is conducive to accurate overprinting of various colors, early detection of positive and negative printing Unacceptable ills and timely troubleshooting. Overprinting black, blue, magenta, and yellow ink density is relatively easy to grasp, both to avoid the appearance of tea tone at low-key place, but also to avoid the black ink sticky, easy to cause the back of the dirty problem, while the yellow final printing, The lack of color and floral version of the yellow version can be found in time. The printed image is clear, structured, good in texture, bright and fresh, suitable for warm-tuned characters, and finally printed with transparent yellow ink can get bright and vivid colors. At the same time, the yellow ink has a quick drying feature, which helps the printed product to be tidy.

Color sequence 4: black, magenta, cyan, yellow

The first black print, magenta; the second print blue and yellow. Because the black ink is printed first, it also has the function of the black ink of the color sequence 3, and the black ink is not easy to be emulsified, which facilitates accurate overprinting of various colors. In the overprinting process, the black, magenta, cyan, and yellow colors can also be used well. Master and ensure gray balance. It is suitable for landscape paintings with cold-key landscapes. The images are clear, rich in color, and bright and bright.
In summary, the third and fourth color sequences are applied more in color printing. They have similarities and differences, although there are multiple combinations of yellow, magenta, cyan, and black inks. There are many reasons for diversity and color shift. However, as long as we pay attention to analysis and specific application in printing production, we can print out fine and realistic prints by selecting the correct printing sequence.

Source: "Printing Technology"