HP Designjet L25500 Printer Series - Maintenance and troubleshooting guide (second edition)

Subtle stains or uneven appearance
Subtle color differences may be seen on some substrates if they are stored partially covered after printing. In
the period immediately after printing, such substrates should be stored either totally covered or totally
uncovered. It may be advisable to avoid the prolonged contact of two printed faces. This problem tends to
disappear if the substrate is left uncovered for some time.
Alternatively, some individual rolls of substrate may have a defective coating. The solution in this case is to
use another roll.
ENWW Subtle stains or uneven appearance 29