HP DesignJet T790 and T1300 Printer Series - Using your printer
Introduction
Your printer has been engineered with advanced hardware and software features to ensure predictable and
dependable results.
●
Color calibration for consistent colors.
●
One gray and two black inks provide neutral grays on all paper types.
●
The Photo Black ink provides pure blacks when printing on photo papers.
●
Color emulation of other HP DesignJet printers.
How colors are represented
All devices that display color use a color model to represent color in numerical terms. Most monitors use the RGB
(Red-Green-Blue) color model, while most printers use the CMYK (Cyan-Magenta-Yellow-blacK) color model.
An image can be converted from one color model to another, but in general the conversion is not perfect. Your
printer uses the RGB color model: the same color model that is used by your monitor.
This simplies but does not completely solve the problem of matching colors. Each device represents colors a
little dierently from another device, even if they use the same color model. However, software can adjust the
colors in an image according to the characteristics of the particular device, using a color prole of the device, in
order to achieve correct colors.
A summary of the color management process
To get the accurate and consistent colors that you want, you should follow these steps for each paper type that
you use.
1. Color-calibrate the paper type, for consistent colors. Calibration should be repeated every now and then
(see Color calibration on page 70). In addition, you may wish to calibrate immediately before a particularly
important print job for which color consistency is vital.
2. When printing, select the correct color preset for the paper type you are using.
Color calibration
Color calibration enables your printer to produce consistent colors with the particular printheads, inks and paper
type that you are using, and under your particular environmental conditions. After color calibration, you can
expect to get similar prints from any two dierent printers situated in dierent geographical locations.
Some paper types cannot be calibrated. For all other paper types, calibration should be done in any of the
following circumstances:
●
Whenever a printhead is replaced
●
Whenever a new paper type is introduced that has not yet been calibrated with the current set of
printheads
●
Whenever the environmental conditions (temperature and humidity) change signicantly
You can check the color calibration status of the currently loaded paper at any time by pressing and then
on the front panel. The status may be one of the following:
●
Recommended: the paper has not been calibrated.
70 Chapter 10 Color management ENWW