devices. Screens from this system are compatible with screens
generated from the Allegro workflow.
Ruling
Ranges from 40 to 240 lpi (The available values
depend on the output device.)
Dot Shape
EllipticalP, Heavy Elliptical, Light Elliptical, Line, Line1,
Round, Round-Square (Euclidean), Square, Square1
CMYK Default
Angles
165 105 0 45
Valid Color Swaps
Cyan Magenta Black
Maxtone Y30°
This screen system is identical to HQS Classic in all but its yellow
screen. It forms a rosette among black, magenta, and cyan.
The yellow separation is screened at 30° with a ruling slightly higher
than the other separations. It avoids the 0° screen, which may cause
interference problems in some flexography and silkscreen applications.
In its default angle-to-color assignment, magenta-yellow moiré is
eliminated, leaving the cyan-yellow separation pairs susceptible to
moiré.
This system has been formulated for best performance on output
devices to provide even, low-moiré flat tints, especially on large-format
devices. Screens from this system are compatible with screens
generated from the Allegro workflow.
Ruling
Ranges from 40 to 240 lpi (The available values
depend on the output device.)
Dot Shape
EllipticalP, Heavy Elliptical, Light Elliptical, Line, Line1,
Round, RoundSquare (Euclidean), Square, Square1
CMYK Default
Angles
165 105 30 45
Valid Color Swaps
Cyan Magenta Black
Maxtone Y60°
This screen system is identical to HQS Classic in all but its yellow
screen. It forms a rosette among black, magenta, and cyan.
The yellow separation is screened at 60° with a ruling slightly higher
than the other separations. It avoids the 0° screen, which may cause
interference problems in some flexography and silkscreen applications.
In its default angle-to-color assignment, cyan-yellow moiré is
eliminated, leaving the magenta-yellow separation pairs susceptible to
moiré.
This system has been formulated for best performance on output
devices to provide even, low-moiré flat tints, especially on large-format
644
Chapter 12—Outputs
