User`s manual

Chapter 10 - Output Settings
132
FastRIP 10.0 User’s Manual
If you have already chosen a mesh that is appropriate for your artwork, `
then the Frequency = Mesh Count / Ratio.
Conversely, if you know the halftone frequency that is appropriate for `
your artwork, then the Mesh Count = Frequency * Ratio.
Note: When designing artwork in your graphic software application, the best image resolution can be determined
by Resolution = Frequency * 2.5, which will help to avoid creating undersized dots in the highlight areas of the
halftone.
an g l e
To avoid unexpected patterns from appearing in the final print, each of the CMYK separations
must be printed at a specific Angle. e choice of angles is quite subjective, though specific
angles may be preferred according to the printing technology being used.
OF F S e t pr i n t i n g
As a starting point for comparison, a typical set of (CMYK) angles for Offset Printing is (108,
161, 90, and 45). Other combinations of angles can be equally valid, provided that consistent
results are produced. For example, guidelines for other offset angles are:
Black is always set at 45º `
e halftones should be offset by 30º from each other `
No two angles should be at right angles to one another (i.e. 90º between `
two halftone angles)
To help prevent right angles, Yellow is set at 90º (i.e., 45º between Black `
and Yellow). Yellow is chosen for this angle because it is the least notice-
able color at this angle
SC r e e n p r i n t a n d Fl e x O g r a p H y (Fl e x O )
In comparison to typical offset printing angles, here are typical (CMYK) angles used with screen
printing in combination with flexographic techniques:
Cyan
(C)
Magenta
(M)
Yellow
(Y)
Black
(K)
7.5 37.5 22.5 67.5
22.5 52.5 7.5 82.5
20 50 5 80
22.5 112.5 52.5 142.5