uneven ink output t120 Large format printer

[brdavidosb]

I have a large format printer (HP DesignJet T120) when the print head goes from Right to left, the image looks true and full color, however, when it goes back to the right it looks faded, here is what it look like: 

you can see the difference in the green area.

Thank for the help.

[jasonmiamifl · Accepted solution]

Printhead might be defective.... do printhead cleaning first, then do printhead alignment, color calibration....

make sure all pass... you should know what might caused it.

[brdavidosb]

I am still testing, but that seem to have done it, paper calibration seemed to be the problem.