Computer Products of America Image Scanner Operator's Guide fi-4990C

4-7
Grounding Color Area
As Figure 4.3 shows, the top 3-mm part of the read area on each surface should be left blank
(grounding color) by specifying a drop-out color. If the drop-out color cannot be specified, select
“Photo” for the document type (linedrawing or photograph).
For details of the drop-out color, see Page 4-8.
Figure 4.3 Grounding color area
Main scanning direction
Reading
reference
Grounding color
(white) or drop-out
color area
3 mm (0.12")
Subscanning direction
09C4.P65 01.2.17, 5:44 PM7