Printware iJet Press, Operator'S Manual

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SECTION 5
TROUBLESHOOTING
64
Color Mixing Issues:
Color mixing will show as muddy, mottled or distorted (grainy) colors.
Color mixing occurs when the ink from one color channel crosses over into another color channel. Since
the inkjet nozzle rows are located very close to one another (ten rows of ~7,000 nozzles, located within a
0.8 mm space), it is easy for partials or fibers to create bridges across color channels. These bridges allow
ink to flow (wick) from one color channel to another; resulting in a “localized” color mixing event; as
shown in the examples below.
Color mixing can occur for a number of reasons (here are some common ones)

Ink wicking due to fibers bridging (crossing) inkjet nozzles.

Wiper roller saturation (too much ink on wiper roller).

Ink flooding on the nozzle plate; due to printer not being level or excessive back-pressure in the
ink system.
Tip: Muddy, mottled, distorted (grainy) colors can also be caused by the media you are printing onto.
Test the printer, using a compatible “inkjet suitable” media, to determine if this could be the cause.
Possible Solutions:

Make sure printer is on a sturdy, level table.

Perform a “ Printhead Cartridge Conditioning
” routine.

Instead of powering the printer off, when not in use, leave the print engine powered-up; so it can
perform automatic maintenance routines.

Don’t lift the print engine to an angle greater than 60º.

Contact Service person to have them clean/replace the Service Station.