Owners manual

Rendering intent
Rendering intent is one of the settings used when doing a color transformation. As you probably know, some
of the colors you want to print may not be reproducible by the printer. The rendering intent allows you to
select one of four different ways of handling these so-called out-of-gamut colors.
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Saturation (graphics): best used for presentation graphics, charts or images made up of bright,
saturated colors.
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Perceptual (images): best used for photographs or images in which colors blend together. It tries to
preserve the overall color appearance.
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Relative colorimetric (proofing): best used when you want to match a particular color. This method is
mainly used for proofing. It guarantees that, if a color can be printed accurately, it will be printed
accurately. The other methods will probably provide a more pleasing range of colors but do not
guarantee that any particular color will be printed accurately. It maps the white of the input space to the
white of the paper on which you are printing.
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Absolute colorimetric (proofing): the same as relative colorimetric, but without mapping the white.
This rendering is also used mainly for proofing, where the goal is to simulate the output of one printer
(including its white point).
Perform black point compensation
The black point compensation option controls whether to adjust for differences in black points when
converting colors between color spaces. When this option is selected, the full dynamic range of the source
space is mapped into the full dynamic range of the destination space. It can be very useful in preserving
shadows when the black point of the source space is darker than that of the destination space. This option is
allowed only when the Relative colorimetric rendering intent is selected (see Rendering intent on page 100).
Color management from the front panel
You can color-calibrate the loaded paper type from the front panel by pressing , then , then
Image quality maintenance > Calibrate color. See Color calibration on page 92.
The other color options in the front panel can all be found by pressing , then , then Setup >
Printing preferences > Color options.
NOTE: These front panel settings can all be overridden by the printer driver or (with the T1500 series)
Embedded Web Server job submission settings.
T920 series and T1500 series options
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Color/Grayscale: you can choose to print in color, in shades of gray, or in black and white. Default: Print
in color.
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Select RGB source profile: you can choose from a selection of RGB source profiles recognized by the
printer. Default: sRGB.
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Emulate printer: you can choose to emulate a different HP DesignJet printer. Default: Off (no printer
emulation).
TIP: If you have old HP-GL/2 or PostScript files made for a different HP DesignJet printer, you can
send them to the printer and use the front panel to turn on the appropriate emulation mode.
100 Chapter 11 Color management ENWW