11-12 GA-1120 Color Management - Toshiba

1-8 GA-1120 Color Management
If you are printing with the PostScript driver from a Windows computer and have
two-way communication enabled, the name of each downloaded profile is represented
in the RGB Source Profile setting pop-up menu. If you are printing with the AdobePS
driver from a Mac OS computer, downloaded profiles appear as Source-1 through
Source-10. For more information on two-way communication, see the User Software
Installation Guide.
• None instructs the GA-1120 to allow the RGB sources you defined elsewhere, such
as in the application, to be used. When you set RGB Source to None, the
appearance of colors will not be independent of the file type. For example, RGB EPS
files will look different from RGB TIFF files.
With RGB Source set to None, PostScript RGB data that contains a source color
space definition is converted using the CRD specified by the Rendering Style option
(see page 1-5). Non-PostScript RGB data and PostScript RGB data that does not
contain a source color space definition are converted using a general undercolor
removal (UCR) conversion method.
RGB Separation
The RGB Separation option determines how RGB colors (as well as Lab and XYZ
colors) are converted to CMYK. The name of this option is meant to be descriptive,
since the option defines the color spaces that will be used by the GA-1120 to “separate”
the RGB data into CMYK values.
The two choices available for this option determine whether RGB data is converted
into the full gamut of the copier (output) or is first converted into the gamut of
another digital printer or press standard (simulation). This feature is helpful for
making one device behave like another for RGB data. For example, if a high-quality
ICC profile is available for another print device, the copier can simulate the behavior
of that device.
RGB Separation is also useful for prepress applications. For example, it lets you
experiment with the appearance of an RGB scan under different press printing
conditions, without having to convert the RGB data to CMYK data for each
condition. When the desired printing condition is found, you can then convert the
file to CMYK, using the same CMYK simulation profile you used during the
experimentation.