DisplayMaker Legacy ColorMark+ - User Guide

3-10 Tips for Printing with Gamut+ Inks
Tips for Printing with
Gamut+ Inks
Images printed to extended process color ink sets (such as HiFi
CMYKOG) on offset presses are often saved in Lab color space.
For best results on ColorSpan printers, always save images in
RGB color space. This will produce the largest gamut and least
number of color space conversions.
Inside the normal CMYK gamut, most colors will be reproduced
using the CMY inks even in the ROGB (Gamut+) hue areas. The
ROGB ink usage starts at 60-95% of the distance out of the
CMYK gamut, depending on the maximum ink saturation of the
CMYK inks. With more ink saturation of the CMYK inks, the
usage of the ROGB colors will decrease.
The multi-density ink sets that use two or three shades of cyan
and magenta produce a larger gamut than the sets with single
shades of cyan and magenta. Multi-density ink sets will require
less of the ROGB inks than single-density sets to reach the most
saturated regions.
When using the Orange process color in combination with the
Red process color, there will be significantly less Orange usage
because the two colors are calorimetrically close to each other.
The maximum usage of the ROGB inks will be around the fol-
lowing Lab values:
◆ Red – 44, 75, 23
◆ Orange – 68, 55, 113
◆ Green – 49, -73, 27
◆ Blue – 27, 31, -78
Edit the profile’s Red, Orange, Green, and Blue curves to alter
how these inks are used. See Chapter 4, Editing Profiles, for
instructions.