Xerox DocuColor 2045 Color Management Manual

Also see for DocuColor 6060: System guide Getting started Cleaning procedure Installation guide Use manual

Xerox DocuColor 2045 Color Management Manual Manual pdf 12 page image

DocuSP color management2-4 Color Management Guide• The incoming job contains embedded profiles that result inthe printer driver creating a Color Space Array (CSA) for thecolor data. These PDL instructions are honored by thesystem.Xerox enhanced pathIncoming RGB or CMYK data uses the DocuSP Xerox EnhancedPath Look Up Table (LUT) or Emulation LUT when performingthe SWOP™ CMYK to DocuSP print engine CMYKtransformation.Benefits of using this path include:• Faster RIP time via use of the LUTs as contrasted with theICC Path.• This path preserves the Black (K) channel and Blackdarkness.Look Up Tables provide a quick, effective translation from thesource space to the specific printer’s CMYK space. These tablesare faster because the CMYK values are translated directly tooutput space, instead of first being translated to device-independent space and then to the print-engine-specific space.RGB data is converted using 3 x 4 LUTs.4 x 4 LUTs provide direct CMYK to CMYK mapping, preservingblack. When pure black is passed through a source profile (ICCprofile path), it is converted to XYZ. Once in XYZ, there is no wayfor the color management system to know that the color wasoriginally pure black. Thus, pure K is converted to a CMYKcombination (Gray Component Removal, or GCR, is involved inthis process). In contrast, the 4 x 4 tables recognize pure K andoutput the appropriate K for the source-to-destination mapping.The following conditions guarantee a job follows the Xeroxenhanced path:• The incoming job is untagged and using a pre-installedoutput profile.• A Xerox stock is programmed for the job• A non-Xerox stock that is a member of an unaltered Xeroxcolor group is programmed for the job• A Xerox output color profile, included with the system, hasbeen assigned to the job