Offset printing angle arrangement

The common square and circular dots in offset printing are arranged perpendicular to each other in the structure, and dot angles can be represented by 0°-90°. In multi-color printing, dots with more than two colors are superimposed on one another. Dots of different colors intersect each other at different angles. The smaller the angle of intersection is, the larger the pattern is, and the larger pattern will destroy the original tone of the image. When the intersection angle is large, the pattern is small, and the influence on the reproduction of the tone is small.

In spot color printing, the Shanghai business card printing monochrome level printing or monochrome level overlay printing on the field version, the level of the version with a 45 ° angle is usually more beautiful; two different colors of the hierarchical version of the overprint, usually with 45 ° and 90 ° Corners; three different color overlays, usually 30°, 60°, and 90°.

Under normal circumstances, when the intersection angle of the dots is 30°, the pattern presented is more appropriate. Yellow and light colors because of poor color rendering, sometimes the intersection angle can be smaller. In the four-color printing process, there are four commonly used dot angles: 15°, 45°, 75°, and 90°. The main color of the picture is 45°, and the yellow color is 90°.