Oce ColorWave 650, User Manual

Page: 301 / 336

Check, analyze and solve output quality
problems of print jobs
Banding across the print with differences in color and gloss
Description of the problem
Your print contains a banding across the media with a difference in color and gloss. The
intensity of the banding can vary from left to right or vice versa. A clear picture of banding
is visible on the side edge of your print. Banding mostly occurs in Production mode at
densely printed areas.
You can perform an additional check to identify the problem. Simply measure the width
of the banding. Each print mode has a typical banding width. The following table describes
the connection between the print modes and the banding widths.
The connection between the print modes and the width of the banding
#
Typical width of the banding Print mode
42 mm 'Express'/'Express Plus'
21 mm 'Production'/'Production Plus'
17 mm 'Quality'/'Quality Plus'
Cause of the problem
• There are time differences at the turning point of the carriage unit.
At one side, the time between 2 swaths is short (short turn). At the other side, the
crystallization time between 2 swaths is long (long turn). Differences in the crystalliza-
tion time of the toner can cause the banding patterns.
Illustration
[299] Example of banding across the color print
Chapter 8 - Print quality and Print productivity 301
Banding across the print with differences in color and gloss