Graphics Programs Reference
In-Depth Information
software capabilities to produce multicolor profiles, it might be useful to
test the output using such a profile as well as a CMYK or RGB profile.
For printing on a press where more than four colors is the goal, a mul-
ticolor profile has to be built since separations are necessary. The most
common n-Colors are CMYK plus orange and green inks. Pantone devel-
oped a printing process using CMYKOG they call
Hexachrome
. The main
advantage of printing Hexachrome is to produce an extended gamut,
which is obvious to those who have seen output using this beautiful print
process.
The extended gamut of Hexachrome compared to a four-color CMYK
process is seen in Fig. 7-12. Photoshop cannot directly deal with multi-
color profiles or produce color space conversions using such profiles.
Pantone and GretagMacbeth have plug-ins for allowing the use of these
profiles once generated. Hexachrome and other extended gamut print
processes known as HiFi color are not seen as often as the manufactur-
ers of these products would like, simply due to the major cost differences
in printing using six inks versus four. If you have the opportunity to
Fig. 7-12
The extended
gamut of Hexachrome is
seen in this 2D map
courtesy of Pantone. The
orange outline is the
gamut of Hexachrome,
which is significantly larger
than the darker blue
outline of conventional
four-color CMYK. Notice
how the addition of
orange and green inks
extend the gamut in those
colors.
