RGB workflows
hp designjet
5500 series
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RGB and CMYK are device-dependent definitions of color. RGB colors must be
converted to CMYK colors in order to be used by your printer. And this
transformation depends on the target printer.
The transformation from RGB to CMYK requires an ICC profile for the source
device and an ICC profile for the printer. ICC profiles translate device-
dependent RGB or CMYK colors to or from a device-independent color
representation. Because the color that comes out of the printer depends on
the printer setup--such as the printing material and the quality level--you
must select the ICC profile for the intended printing conditions. HP Designjet
printers come with ICC profiles for many different printing conditions.
There are a few frequently used types of RGB color such as sRGB, Apple
RGB, Adobe RGB, or ColorMatch RGB.
Applications such as Adobe Photoshop and Illustrator allow you to use ICC
profiles to convert RGB to CMYK.
If your design application does not support ICC profiles, it gives you no
control over the conversion from RGB to CMYK. So, always convert data into
CMYK before putting it into the application. Make sure that the CMYK has
been optimized for the printer that will handle the data (see
CMYK
workflows).
Some applications send unidentified RGB data instead of CMYK. In such a
case, the printer will carry out the conversion from RGB to CMYK. You must
select the type of RGB data in the PostScript driver, in the Printer Color
Management/RGB Emulation option. For applications such as Adobe
PhotoShop that do identify the RGB they are using, this setting will have no
effect.
Alternatively, you can use the WebAccess Submit Job facility to send the RGB
data to the printer.
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