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Glossary 197
Three quartertone Tone area of an image influencing the shadow detail and with
density values between the Midtone and the Dark Point.
Typically printed with a dot area near 75%.
Tone compression
The reduction of the density range of an original to the density
range achievable in the reproduction.
Tone reproduction curve
A graph showing the density of each point of the original and
its corresponding density on the reproduction.
Trapping
Creating and overlap (spread) or an underlap (choke) between
colors that adjoin each other to hide misregistration during
printing. Trapping is sometimes referred to as spreads and
chokes, or fatties and skinnies.
UCR
Abbreviation of Undercolor Removal. This is a method for
reducing the CMY content in neutral gray shadow areas of a
reproduction and replacing them with black. As a result, the
reproduction appears normal but less process color inks are
used. See also
GCR
.
Unsaturated color A color whose highest value is less than approximately 80%.
In an unsaturated, dirty color, the difference in the values of
the wanted colors and the unwanted color is relatively low.
For example, when the color is red, 30% cyan, 80% magenta,
70% yellow is more unsaturated than 0% cyan, 90%
magenta, 80% yellow.
Variable Information (VI) Variable information (VI) jobs are jobs in which the printed
materials are individualized for specific recipients or purposes.
These materials can include bills, targeted advertising and
direct mailings.
Vector drawing The geometric system used to define lines and curves in many
computer graphics most often used for line drawings.
Vignette See
Degradé
.
Virtual printer
For Macintosh and Windows networks, the IC-301 print
controller provides three default network printers, known as
virtual printers. Virtual printers contain preset workflows that
are automatically applied to all print jobs processed with that
virtual printer.