Specifications

COLORWISE PRINT OPTIONS 22
Gray (RGB) and Gray (CMYK)
When Gray (RGB) is enabled, any RGB color where R=G=B is printed using only black dry
ink instead of processed black. Similarly, when Gray (CMYK) is enabled, any CMYK color
where C=M=Y=0 and K=any value is printed using only black dry ink instead of processed
black.
You can choose to apply the Gray (RGB) or Gray (CMYK) option to either Text and Graphics
or to Text, Graphics, and Images.
The following limitations apply:
• The Gray (RGB) or Gray (CMYK) option has no effect on a job that is pre-separated.
• If CMYK/Grayscale Processing Method is set to Pure Primaries, the Gray (CMYK) setting
does not affect the output.
• If Separate RGB/Lab to CMYK Source is enabled, the Gray (RGB) option is set to Off.
Likewise, if the Gray (RGB) option is not set to Off, you cannot enable Separate RGB/Lab
to CMYK Source.
• If Black Text and Graphics is set to Pure Black On or Rich Black On, it takes precedence
over Gray (RGB) or Gray (CMYK) for 100% black text and graphics.
• If a gray is specified as a spot color, the Gray (RGB) or Gray (CMYK) option does not
affect that gray.
Optimize RGB Transparency
The Optimize RGB Transparency option affects jobs with the following characteristics:
• The job is in PDF format (submitted to the EX700i as a PDF file, not submitted from an
application through a printer driver).
• The job contains transparent RGB or Lab objects. They might be objects that you have
specified as transparent using an application that supports this capability, or they might be
objects with a special effect, such as a drop shadow, that uses transparency to achieve the
effect.
• The transparent objects overlap, creating an area of mixed color.
• The Adobe PDF Print Engine Preferred option is not enabled, which means that the
EX700i converts the PDF job to PostScript when processing the job.
If you enable Optimize RGB Transparency, the EX700i will use the correct RGB source
profile and rendering intent when converting the overlapping RGB colors to CMYK during
the PDF-to-PostScript conversion. If you disable Optimize RGB Transparency, the area of
overlapping colors might print with incorrect color or undesirable artifacts.
Optimize RGB Transparency can result in a longer processing time, especially for VDP jobs
that contain multiple individual PDF pages. We recommend that you enable Optimize RGB
Transparency only when necessary to achieve correct color output.