G-7
Glossary
spot color
A color that is printed on its own
separation plate when separations are
specified. A spot color is printed using a
custom ink for that color, in contrast to
process colors that are printed using
combinations of cyan, magenta, yellow,
and black.
Status T
A spectral response for graphic arts
reflection densitometers defined by
ANSI (the American National Standards
Institute).
subtractive color model
A system in which color is produced by
combining colorants such as paint, inks,
or dyes on media such as paper or
transparent film or acetate. All printing
devices use the subtractive color model.
subtractive primaries
Cyan, magenta, and yellow colorants
used in subtractive color systems for
color printing. Combining the
subtractive primaries produces darker
colors. Black is added to the subtractive
primaries to compensate for deficiencies
of the toners or inks, and for more
efficient black printing.
substrate
In printing, the material upon which the
job is printed.
SWOP
The abbreviation for Specifications for
Web Offset Publications. A standard of
specifications for separations, proofs, and
color printing on a web offset press (not a
sheet fed press).
undercolor removal
In areas where all three process colors (C,
M, Y) overprint, the amounts of those
colors are reduced and replaced by black.
This improves wet ink trapping and
reduces ink costs in process color
printing.
vector image
Graphic illustration created on
computers where picture objects are
defined mathematically as lines or curves
between points. These mathematical
definitions are interpreted by an image
language such as PostScript. Vector
images include artwork created with
illustration applications (such as
Illustrator or FreeHand) and page layout
applications (such as PageMaker).
