7.0

W
hen working with QuarkXPress Server:
•
When adjoining process colors have an absolute trapping relationship and
Process Trapping is checked, QuarkXPress Server divides the Auto Amount
trapping
value in half and applies the resulting value to the darker component
of the color on each plate (as shown in the table). Dividing the value among
plates creates a smoother trap while providing the same area of overlap.
ABSOLUTE PROPORTIONAL
COLOR OBJECT BACKGROUND TRAP TRAP
C 70% 30%
+
1
⁄2 trap amount Auto Amount
(70%–30%)÷2
M 30% 50%
–
1
⁄2 trap amount Auto Amount
(30%–50%)÷2
Y 70% 80%
–
1
⁄2 trap amount Auto Amount
(70%–80%)÷2
K 20% 15%
+
1
⁄2 trap amount Auto Amount
(20%–15%)÷2
• When abutting process colors have a proportional trapping relationship,
QuarkXPress Server multiplies the Auto Amount value specified in the
Trapping pane by the difference in darkness between the object color and
the background color. The resulting trapping value is then applied the same
way as adjoining colors for colors with absolute trapping relationships.
Uncheck
Process Trapping to trap all process components equally using the
trapping value associated with the object color relative to the background color.
For text up to 24pt and small items (dimensions up to 10pt), QuarkXPress
Server attempts to preserve the item’s shape during process trapping by not
allowing automatic spreads or chokes when the item’s shape would be com-
promised. QuarkXPress Server attempts to preserve item shape by comparing
the darkness of each process component of an item to the darkness of its
entire background. A spread is applied only when the process components of
an item are less than or equal to half the darkness of its background. A choke
is applied only when the process components of a background are less than
or equal to half the darkness of the item in front of it. You cannot choke text.
IGNORE WHITE (CHECK BOX)
QuarkXPress Server Þ Preferences Þ Trapping pane
Check Ignore White to specify that an object color in front of multiple back-
ground colors — including white — does not take white into account when
trapping. It is checked by default.
SERVER PREFERENCES
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CHAPTER 2: THE QUARKXPRESS SERVER USER INTERF
ACE