Special printing film film screening angle

2018-05-01 09:01:14
The screen angle refers to the acute angle between the centerline of the screen and the horizontal line. In monochrome printing, the screen angle of 45 degrees is often used . At this time, the visual effect is best. When multicolor printing, moiré fringes are generated due to the regular superposition of dots. The method to avoid moiré fringe is to use the maximum angle of the screening angle for the four-color printing film as far as possible. In general, four-color printing mostly sets the main color to 45 degrees, and other colors have a difference of 30 degrees in the screening angle:

The main characters of the original, people observed mainly in the center of the face, for the face and the color difference is very sensitive to the level should be set magenta color, the screen angle to 45 degrees CMYK turn to take 15, 45, 90 , 75 ;

For landscape-based manuscripts, the color tone is mainly green , and the cyan screening angle should be set at 45 degrees to reveal the natural and beautiful scenery features . The other colors are arranged in the following order : CMYK takes 45 in sequence. 15 , 90 , 75 . Although setting the main-tone screening angle helps to express the main characteristics of the original , it is important to use the appropriate color sequence when printing . If the main color is not printed at a later position , the color of the later printing will cover it . This is due to the opacity of the ink;

Making printing film is only the first step for high-quality pad printing and screen printing . We should attach great importance to it . Now laser photo-discharging technology has been popularized in offset printing , gravure printing , flexo printing and other mainstream printing technologies , and has begun to extend to special In the printing industry , mastering the traditional art of film printing will lay the foundation for the adoption of new technologies in the future.