Graphics Programs Reference
In-Depth Information
Fig. 7-4
The various GCR
options found in the
Photoshop Classic Engine
illustrates via curves what
happens as GCR is
increased from none, to
light, all the way to heavy.
Note the relationship
between the black curve
and the other CMY curves.
The red square is shown to
illustrate where GCR
begins to affect the curves
within the tone scale.
Other products that
produce options for GCR
will show a similar effect.
being used for the separation and used where further ink renditions
might be necessary. In Photoshop, altering Black Limit doesn't update the
Total Ink field yet this does affect the total mix of all inks. In most cases,
leave both Black Start and Black Limits at their defaults. However, should
the need arise to handle how black ink is being used on either end of the
tone scale, the controls are available on some products. I would advise
against using the Photoshop classic CMYK engine if possible (it's flaky)
