Riso GOCCOPRO 100 User Manual page 39

• Selecting [Custom] displays the [Custom] dialog box, where you can manually
enter the width and length of the original.
You can also switch between original size units (inch/mm).
• It is useful to register the sizes of frequently used irregular-size originals in the
printer driver in advance since they can be selected from the [Original size]
from the drop-down list.
"Registering Original Size" on page 72
3) Auto Screen Making:
When this checkbox is checked, the original data transmitted from your computer to
the machine is not put in the screen-making queue, but is promptly processed for
screen making. Be sure to remove the checkmark for normal use. Screen making is
executed using the frame that has been selected when the original data is received.
4) Screening type:
You can select a gradation expression method (half tone processing) for halftone
and color images from the following two methods.
Processing Gradation expression
method
Expresses gradation by chang-
Screen-
ing the size of dots according to
covered
the density of the original.
Expresses gradation by perforat-
ing or not perforating the screen
Grain-touch
for each dot according to the
density of the original.
When [Screen-covered] is selected, the following parameters can be set.
• Screen frequency: The fineness of dots can be set in the lines per inch.
Indicates how many dots are arranged in one inch / 25.4 mm.
- Unit:
- Setting range:
- Initial value:
• Screen angle: The angle at which dots are arranged can be set. Adjusted if
moire (interference pattern) occurs.
- Unit:
- Setting range:
- Initial value:
method
line
38 to 200 lines
38 lines
degree
0 to 90 degrees
37 degrees
Degree of Degree of
gradation detail
expression reproduction
High Low
Low High
37
2
How to Produce an Imaged Screen