Colors In Printed Images Are Uneven; Image Edges Are Blurred Or White Banding Occurs; The Contrast Becomes Uneven During Printing - Canon imagePROGRAF iPF720 User Manual

Problems with the printing quality

Colors in printed images are uneven

Line Drawing/Text is selected when printing images
in many solid colors.
You are printing on paper that curls easily.
Printed colors may be uneven if you set the Print
Quality too low.
Color may be uneven between dark and light image
areas.
When using Borderless Printing, the edge of the
paper is cut during printing. Thus, ink density may
not be even at the edges.
The Printhead is out of alignment.
Drying documents stacked on each other may cause
uneven colors.
Color density may be uneven if you use Glossy
Paper, art paper, or Coated Paper.

Image Edges are Blurred or White Banding Occurs

The Platen suction is too strong.
The Printhead is set too high.

The contrast becomes uneven during printing

The paper feed amount is out of adjustment.
562 Troubleshooting
Cause
Cause
Cause
Corrective Action
Specify Image in the printer driver.
Printed colors may appear uneven on the leading
edge of paper that is susceptible to curling. Increase
the level of vacuum holding the paper against the
Platen or specify a margin of 20 mm (0.79 in) or more
for the leading edge.
(→P.506)
Choose a higher level of Print Quality in the
Advanced Settings of the printer driver.
(→P.180)
Select Unidirectional Printing in the Advanced
Settings of the printer driver.
Specify No in Auto Cut in the printer driver before
printing. In this case, the paper can be printed without
borders on the left and right sides only. Cut the
printed document ejected from the printer, then use
scissors to cut away the edges on the top and bottom.
Choose a higher level of Print Quality in the
Advanced Settings of the printer driver.
(→P.180)
Adjust the Printhead alignment.
(→P.491)
To avoid uneven colors, we recommend drying each
sheet separately.
In Advanced Settings of the printer driver, choose
Highest or High in Print Quality.
Corrective Action
Set VacuumStrngth to Weakest.
(→P.506)
Lower the Printhead.
(→P.497)
Corrective Action
Adjust the feed amount.
(→P.498)
Execute Fine Band Adj. during printing.
(→P.498)