User manual

4 • Setting the physical scan parameters

ColorQuartet 5.0 Pro

Setting the screen ruling

What it is

Image printing is based on the technique of breaking up the image into tiny dots of color that

can be reproduced on a press. Screen ruling or screen frequency refers to the pattern and fre-

quency of these dots.

How to set it

• ColorQuartet allows you to use any screen ruling you want, and remembers the value until

you change it.

• The screen ruling chosen depends on how the image is to be printed, including the printing

process and paper to be used, and should therefore be agreed upon with the company that

will do the printing.

Typical values are:

• Screen ruling is set in the

Magic Touch window (Size & Resolution section) or the Scan Setup

window (Enlargement & Ruling section).

• Choose lines/inch or lines/cm, type in the desired Screen Ruling, and press the tab key to con-

firm.

• NOTE: Increasing the Screen Ruling will automatically increase both the Scan Resolution

and

the File Size.

• Newspapers

• Magazines

• Offset (medium quality)

• Offset (good quality)

• Offset (high quality)

• 85-100 lpi (34-40 l/cm)

• 133-150 lpi (54-60 l/cm)

• 133 lpi (54 l/cm)

• 150-175 lpi (60-70 l/cm)

• 200+ lpi (80+ l/cm)