Microtek ArtixScan 4500t, Справочное руководство

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138 ScanWizard Pro for Macintosh
So, Source and Destination mirror a logical two-step process most Color
Management Systems use to translate images between device color spaces;
• The Source Profile brings the image into the PCS
• The Destination Profile connects the image from the PCS to the output device,
such as a Monitor, Printer, or Proofer.
However, this is not the case with a Kodak CMS.
Kodak has patented its composition technology. This technology takes the Source
and Destination Profiles and composes them into a single color transforming
profile.
This technology adds significant improvement in the quality and performance of
the Color Management System.
Note: You use the Source/Destination information when you setup or use your CMS-based
application, such as PageMaker 6.5.
Controlling UCR & GCR
Controlling UCR and GCR with Professional CMYK Profiles
In the final stages of color prepress production, the issues change: And your role
changes with them. You become that of a professional separator. And it becomes a
question of how skilled you are at making good films, films that run correctly on
press, avoiding downtime, rework, and expense.
Kodak Digital Science Professional CMYK Profiles helps you with your separations.
It expands your selection of undercolor removal (UCR) and gray component
replacement (GCR) options, so you can produce correct, quality separations.
Some Background
It is difficult to print four wet layers of ink on top of one another. This is one of the
physical constraints of the printing process.
In theory, if you printed a 100% of each CMYK layer, you would have 400% Total
Area Coverage (TAC). Real-world experience proves this to be impractical. It is
difficult to print jobs that have more than 340% TAC, and most printers feel more
comfortable with 280% TAC.
Another area of practical concern is in how process inks are combined. Most
printers can not produce a clear, dense black from cyan, magenta, and yellow.
Black is needed to produce better details, contrast, and to get a desirable density.