Adjusting The Saturation Setting - Epson PERFECTION 1640 SU Reference Manual

You can enter a value between 0 and 100. Changing the value
causes the color in the right hand box to change accordingly.
The changes are also reflected in the image in the Preview
window.
Note:
See "Color Adjustment" on page 3-26 for more information on
adjusting the gray balance intensity level.

Adjusting the Saturation Setting

Saturation is the density of a color. Higher saturation makes the
color appear richer, while lower saturation makes it appear paler.
To change the saturation level of the image, move the Saturation
slider left or right, or input a value in the text box.
You can enter a value between -100 (lowest color density) and 100
(highest color density).
Note:
See "Color Adjustment" on page 3-26 for more information on adjusting
the saturation level.
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Scanning Basics