Definitions for "SCREEN ANGLES"
Keywords:  moir, cyan, magenta, halftone, angle
Angles at which screens intersect with the horizontal line of the press sheet. The common screen angles for separations are black 45 degree, magenta 75 degree, yellow 90 degree and cyan 105 degree.
Halftone screens layer at different angles to reduce screen patterns. Generally: Black 45°, Red 75°, Yellow 90°, and Cyan 105°.
Angles used to offset the four different films of a color separation. The dot screens are angled to eliminate Moire patterns in the final images. The usual screen angles are 15 detrees for cyan, 75 degrees for magenta, 45 degrees for black, and 0 degrees for yellow.