Canon C850 Practical Manual page 144

When Your Printouts Look Like���
If colors that have the same hue but
have different brightness are adjacent to
each other, the boundary between light
areas and dark areas appears white� This
is because the toner does not fix to the
paper�
← Feeding Direction
The moiré effect occurs when copying�
142 142
imagePRESS C850/C750/C650/C65
Check the Cause and Remedy Below
Cause
The machine cannot develop the images correctly at
the border of two areas due to the deterioration of the
developers�
Remedy
To improve this situation, adjust the voltage for the
image development in [Correct White Gap]�
→ [Adjustment/Maintenance] → [Adjust Image
Press
Quality] → [Correct White Gap] → change the setting
value to [1] or [2]�
"Adjustment for Image Quality and Finishing
(Calibration)" > "White Gap Correction" in the User's
Guide
Cause
Moiré occurs when regularly spaced dots in two or more
patterns in an image overlap� The dots in a halftone
image may create a moiré effect when scanned by the
machine�
Remedy
Select [Map] in [Original Type] to reduce the moiré effect�
→ [Copy] → [Options] → [Original Type] →
Press
select [Map]�