Screen angle

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Examples of typical CMYK halftone screen angles

In offset printing, the screen angle is the angle at which the halftones of a separated color is outputted to a lithographic film, hence, printed on final product media.

Why screen angles should differ[edit]

In offset printing, colors are output on separate lithographic plates. Failing to use the correct set of angles to output every color may lead to a sort of optical noise called a moiré pattern. These patterns appear as bands or waves in the final print.[citation needed] There is another disadvantage associated with incorrect sets of angle values, as the colors will look dimmer due to overlapping.[citation needed]

While the angles depend on how many colors are used and the preference of the press operator, typical CMYK process printing uses any of the following screen angles:[1][2]

C 15° 15° 105° 165°
M 75° 45° 75° 45°
Y 90° 90°
K 45° 75° 15° 105°

References[edit]

  1. ^ Campbell, Alastair. The Designer's Lexicon. 2000 Chronicle, San Francisco. p 192
  2. ^ McCue, Claudia. Real World Print Production. 2007 Peachpit, Berkeley. p 31.