Xerox DC 250 Color settings

Hi everyone !

Does anybody know where to find detailed explanations about menus:
- Color wise
- Image Quality
settings ?

There are many things under those menus but I don't know how to use it and how to apply right setting for some outputs.

Thank you !

 

Which RIP? You should have a documentation CD which contains a folder of reference PDFs.

On the image quality tab I am not sure when you would select normal vs. best for text/graphics quality and image quality. See if you can see a difference.

The colorwise tab allows you to specify the RGB->CMYK conversion the RIP will do and how the details of color are handled:

Black Overprint
allows you to specify whether or not black text or black text and
graphics, defined as RGB=0, 0, 0, or as CMYK=0%, 0%, 0%, 100%, overprints colored backgrounds.
• Text: Black text overprints colored backgrounds, eliminating white gaps and reducing the
halo effect or misregistration of colors. Choosing this setting automatically sets the Black
Text/Graphics option to Pure Black On.
• Text & Graphics: Black text and graphics overprint colored backgrounds, eliminating
white gaps and reducing halo effects or misregistration of colors. Choosing this setting
automatically sets the Black Text/Graphics option to Pure Black On.
• Off: Black text or text/graphics knocks out colored backgrounds.
(may be overridden by the application you print with)

Black Text/Graphics
determines whether blacks are made up of pure black (K toner only) or Rich Black (CMYK.) Pure delivers a truer neutral black, but rich black delivers a darker black and can make up for a weak or near-end-of-life black drum in use too.

CMYK Simulation Profile
The CMYK Simulation Profile print option allows you to print press proofs or simulations.
This setting specifies the offset press standard or other color printing device that you want to simulate. This option affects CMYK data only.

CMYK Simulation Method (GCR method)
The CMYK Simulation Method allows you to define your preferred CMYK-to-CMYK conversion technique.
• Quick applies one-dimensional transfer curves to adjust output densities in the cyan, magenta, yellow, and black channels. This technique leads to eye-pleasing color output from your copier because pure primary colors are not “contaminated” by other colorants. While it is the fastest simulation method and perfect for drafts, avoid using it for final documents that are used as press proofs. Other techniques offer the color simulation accuracy required by proofing applications.
• Full (Source GCR) provides a complete and accurate simulation based on colorimetric transformations. Hues are preserved, even for primary colors. The Gray Component Replacement (GCR) level that was specified in the original (source) document is also preserved for K-only text and graphics. Processed black expressed in CMY is reproduced using CMY toner. Full (Source GCR) is recommended for the highest quality press proofing applications.
• Full (Output GCR) is a complete and accurate simulation method based on colorimetric transformations. Hues are preserved, even for primary colors. With this method, the Gray Component Replacement (GCR) level that was specified in the original document is not preserved. Instead, all CMYK data is reseparated using the GCR level specified by the output profile. This simulation technique is similar to traditional ICC color matching methods and is more appropriate than Full (Source GCR) for full color printing designed for the press, but reproduced on your copier.
NOTE: When you specify Pure Black On for Black Text/Graphics and Full (Output GCR) for CMYK Simulation Method, the black text and graphics in your document are printed with 100% black-only toner.

Output Profile
The default output profile consists of a profile for your copier that describes its color characteristics and a calibration target that describes the expected behavior of the copier. If you don't have a spectrometer to create your own you can download the color profiles from the xerox website which include basic profiles for plain, heavyweight, and coated papers.

Rendering Styles
The Rendering Style option specifies a CRD for color conversions. To control the appearance of images, such as prints from office applications or RGB photographs from Photoshop, select the appropriate rendering style. The Fiery allows you to choose from the four rendering styles currently found in industry standard ICC profiles.

Photographic Typically results in less saturated output than presentation rendering when printing out-of-gamut colors. This style preserves tonal relationships in images.

Presentation Creates saturated colors but does not match printed
colors precisely to displayed colors. In-gamut colors, such as flesh
tones, are rendered well.

Relative Colorimetric Provides white-point transformation between
the source and destination white points. For example, the bluish
white color (gray) of a monitor is replaced by paper white. This style
avoids visible borders between blank spaces and white objects.

Absolute Colorimetric Provides no white point transformation
between the source and destination white points. For example, the bluish white color (gray) is not replaced by paper white.

RGB Separation
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 helps make 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 allows you to
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, convert the file to CMYK, using the same CMYK simulation
profile that you used during the experimentation.
NOTE: Use the RGB Separation print option in conjunction with the Output Profile or
CMYK Simulation Profile print options.
• Output converts all RGB colors into the CMYK color space of your copier (when set to the
printer’s default), or a customized CMYK color space for your copier (when set to
Output 1-10).
• Simulation converts all RGB colors into the CMYK color space for a specified simulation
(select the desired simulation with the CMYK Simulation Profile print option).

RGB Source Profile
ColorWise Pro Tools Profile Manager to download custom monitor or scanner profiles. When you specify a setting other than None for the RGB Source Profile, the Fiery overrides source color space definitions or profiles that other color management systems may have specified. For example, if you specified a ColorSync System Profile on your Mac OS
computer, the RGB Source Profile setting overrides it. In cases where you do not want this setting to override another specified source color space, choose None. When you specify a setting other than None, because the color space definitions are overridden, the output from the Fiery is consistent across platforms. The Fiery RGB Source
Profile options are as follows:
• EFIRGB specifies an EFI-defined color space recommended for users who have no detailed information about their RGB data.
• sRGB (PC) specifies the definition of a Windows computer monitor profile used as the default.
• Apple Standard specifies the definition of a Mac OS computer monitor profile used as the default.
• Adobe RGB (1998) is an Adobe-defined color space, used in pre-press as the default working space in Photoshop 5.
• ECI-RGB is the European Color Initiative (ECI) recommended space for use as an RGB
working color space and color data exchange format for ad agencies, publishers,
reproduction and printing houses.
• Fiery RGB is an EFI-defined color space recommended for users of office applications. This
color space is similar to EFIRGB but is larger and can provide a more desirable blue
output.
• Sources 1-10 specify the definitions you download as RGB source profiles.
• None instructs the Fiery 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 is not independent of the file type. For example, RGB EPS files looks 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.

AutoTrapping
prevents white outlines from appearing around objects. Takes the lighter shade of two adjacent colors and overprints the darker with it slightly. Can be useful to hide wear/slip of the ITB transfer belt.