HP 2000CP 2500CP - Manual (Page 145)

Print Quality 6-3 HP DesignJet CP Series Printers
6 Driver print quality configuration:
To clarify if the reason of the problem is related with the print mode
defined with the Non-HP Driver try the following:
D Print the same sample using the Non-HP driver and their normal
media.
D Print one of the internal demos or print the Image Quality Print
(details
' page 6-5) using HP Media and configuring the
plotter/printer as indicated previously.
If the output obtained using the HP Solution is good and the one
obtained through the 3rd party solution is bad, HP support organization
should:
D Communicate to the customer that the problem is not in the printer
and that he should address it through the 3rd party vendor support
structure.
7 Service Accuracy Calibration (details
' page 5-17)
D Perform “Service Accuracy calibration” using HP Matte Film. If not
available, use Coated media if required.