Glossary: ​​screen angle

There should be a difference of 30 degrees between the screen angles of the primary colors, and only the yellow version can be 15 degrees out of phase with other versions, and this angle is between the cyan and magenta versions, or the cyan angle and black Between the edition angles.

According to the main tone of the image, as long as the two versions of the screen number change, we can also accept the effect of setting the yellow version to the same angle as the cyan or black version. Although, the software may use slightly different algorithms when calculating the angle of the network, the angle between the angles can reach approximately 30 degrees.

Normally the main color is best at 45 degrees (in most cases, the color is the main color). If the copy of the image, the use of full-color removal of the GCR method, then, the black version becomes the main color version, then its angle should replace the magenta, become 45 degrees.

In two-color printing, the angle of the two screens should be different by 30 degrees. At this time, the angle of the black screen should be arranged at 45 degrees. On film, on proofs and during printing, screen angles and screens should use this method without a moiré effect.

In general, electronic files should not include settings for screening parameters and dot shapes. When a print or film is produced directly by a printer using an electronic file, the printer must take full responsibility for the problem of moiré and, in any case, help solve the problem. If we need to use special angles to prevent the appearance of moire when we are making, we must inform the printing staff.