HP DesignJet 2500CP Service Manual page 158

PQ Problem:
Printheads Affected:
Problem Description: 1 3 millimeter ring or edge of light coloring where
Cause of Problem:
Corrective Action:
PQ Problem:
Printheads Affected:
Cause of Problem:
PQ Problem:
Cause of Problem:
6-22
Bleed into white areas on Glossy media (Chia)
Imaging Inks (maybe UV Inks on
non recommended medias)
white should be. Occurs worst on thin lines, and
after white regions of a print.
Thin layer chromatography effect occurring
between inked and uninked areas of the media.
Try the following:
1 Printing in a faster printmode will reduce or
eliminate this effect.
2 Add a 0.5cm stripe of the color showing the
problem down the sides of the print, where it
can be cut off after the print is finished.
3 If using non HP media, try using HP media
instead. If using HP High Gloss White Film
(not recommended for CP series!), try HP High
Gloss Photo or 3M Vinyl instead.
4 Reduce ink density in the affected area of the
print. This may prevent the problem as well.
Bleeding in stacked prints
Imaging Inks
Prints develop bleed when stacked up soon after
printing.
Light band with frequency of 1/2 media roll
circumference
Media stop or core insert rubbing against roll
cover, causing media tension change.
HP DesignJet CP Series Printers Image Quality