Chapter 1. Color Management Background - Kodak

Chapter 2. Using ColorWise Pro Tools
Color Setup
Example:
If you set this value to 80%, this means that all post-linearization text
that is 81-100% will be reduced to 80%. Any post-linearization text
that was 0-79% is not changed.
The two color ink limit value determines the maximum ink allowed in
text that contains two of the primary printing colors.
Example:
If you have blue text that contains 100% of both cyan and magenta,
and this limit is set to 180%, the ink will be limited in that text to 90%
of each cyan and magenta so that the total amount is 180%. Any
post-linearization 2 color text that was 0-179% is not changed.
The third setting is to control process black text above a certain
percentage. The value entered here will determine at what
percentage is black text that is made up of cyan, magenta, yellow and
black is converted to just black. The percentage of black that the text
is converted to is determined by the Single Color Limit, discussed on
the previous page.
Black Overprint
The Black Overprint option allows you to specify whether or not black text
or text/graphics—defined as RGB = 0, 0, 0, or as CMYK = 0%, 0%, 0%,
100%—overprints colored backgrounds.
These values are also special in that they are caught by the Fiery and not
processed through a profile if you are in a workflow that uses them. This
prevents any black text and/or graphics defined in either RGB or CMYK
color space to be preserved and printed with just black text.
Text
Text & Graphics
Off
Black text overprints colored backgrounds, eliminating white
gaps and reducing halo effects or misregistration of colors
Black text and graphics overprint colored backgrounds,
eliminating white gaps and reducing halo effects or
misregistration of colors.
Black text or text/graphics knocks out colored backgrounds.
Note: PostScript applications may perform their own black overprint
conversions before sending the print job to the Fiery.
Special Notes About Text
0,0,0,100% CMYK (black) text and graphics (vector art) is always
preserved. No matter what linearization or what Single Color Text Limit is
set, the output will always be 100% black for these objects.
0,0,0 RGB (black) text and graphics (vector art) is always converted to
0,0,0,100% CMYK (black). As described in #1, once the RGB text
becomes 100% black in CMYK, it will not be affected by linearization or
the Single Color Text Limit.
If you have 0,0,0,100% CMYK (black) text in an image and wish to
preserve it, make sure you implement a “w” curve in your Output ICC
Profile (see “Output Profile Creation” on page 2-25).
Color Management and Workflow User Guide 2 - 21