Xerox DocuColor 2045 Color Management Manual Download Page 1

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May

2003

701P40210

Xerox Document Services Platform

Color Management

Guide

Summary of Contents for DocuColor 2045

Page 1: ...May 2003 701P40210 Xerox Document Services Platform Color Management Guide...

Page 2: ...ope and XEROX Canada Limited The Document Company the stylized X and all names identifying numbers used in connection with Xerox products mentioned in this publication are trademarks of XEROX CORPORAT...

Page 3: ...ative path 2 5 Fast Reprint path 2 5 PANTONE path 2 5 Color Manager 2 6 Associations 2 6 Calibration 2 6 New Stock 2 6 Assign profile 2 6 New color group stock group 2 6 Color profiles 2 7 User TRCs 2...

Page 4: ...up 3 7 Three Stock Model Setup 3 8 Custom and Colored Stock hints 3 11 4 Using color tools 4 1 Using Custom color mode default 4 1 Basic color tools 4 2 Image quality tools 4 3 User Tonal Reproduction...

Page 5: ...that the DocuSP operator is familiar with the DocuSP controller and the attached print engine and is also familiar with color printing Refer to the DocuSP on line help system for procedures on how to...

Page 6: ...Directory paths for example Browse to the Color profiles directory Text that you enter for example Enter purple or Xerox Calling attention to text that is particularly important for example Select Sto...

Page 7: ...on Color Management Guide 1 3 Customer Support For service and software support dial 1 800 821 2797 This number is enabled for TTY bridges To reach Xerox Documentation and Software Services dial 1 800...

Page 8: ...Introduction 1 4 Color Management Guide...

Page 9: ...alftone Color management software converts RGB and CMYK input color profiles to the color gamut of a specific output device DocuSP supports the traditional CMYK workflow as well as the ICC Profile wor...

Page 10: ...made by you the user Color path charts Jobs take one of five paths through the DocuSP controller Whenever possible you should use the Xerox Enhanced Path which provides the highest quality color for...

Page 11: ...the color is transformed from Input such as RGB or input CMYK to Profile Connection Space PCS to output CMYK or SWOP CMYK The K channel will not be preserved for incoming CMYK data The chief benefit...

Page 12: ...stead 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 preserving...

Page 13: ...ngine Fast Reprint path Fast Reprint jobs accessed through Reprint Manager are saved using Print and Save or Save commands when processing the job Fast Reprint jobs do not require re RIPping Color man...

Page 14: ...or color group For more in depth information regarding calibration see chapter 3 New Stock Destination color profiles are required for each stock or color group Stocks added from the catalog Xerox Qu...

Page 15: ...User Tone Reproduction Curves TRCs provide the skilled user with a tool for adjusting the individual CMYK color separations in an image and saving those adjustments for use on other images The User T...

Page 16: ...System Specified pre installed and optimized for the iGen3 Lightness 0 Contrast 0 Saturation 0 Color Cast all 0 TRCs None Press Color Emulation None Table 2 2 DocuColor 2045 2060 6060 mode default pr...

Page 17: ...None Press Color Emulation None Table 2 2 DocuColor 2045 2060 6060 mode default property settings Queue Property Queue Setting Table 2 3 XCC mode default and override settings Queue Property Queue Set...

Page 18: ...to make adjustments in color images Lightness controls the relative brightness or darkness of the color image Contrast is the ratio between the light tones and dark tones in an image Saturation contro...

Page 19: ...the color transformation from the device independent space to the print engine CMYK space Halftones are screen patterns achieved by printing dots or lines in a specific pattern The distance between th...

Page 20: ...ing intent provides color mapping options The available rendering intents are covered in detail in Chapter 4 Using Color Tools and are as follows Saturation Perceptual Relative Colorimetric Absolute C...

Page 21: ...gh resolution images at RIP time This speeds up job submission time because you can submit a job with the low resolution images much faster than with high resolution images OPI is covered in more deta...

Page 22: ...DocuSP color management 2 14 Color Management Guide...

Page 23: ...one for printing you need not calibrate it Once a stock is calibrated DocuSP saves that calibration and automatically selects the latest calibration for the stock when the stock is required by a job D...

Page 24: ...oups cannot be deleted Xerox Qualified Stocks may be removed from your Stock Library but not from the Stock Catalog However you may add new non Xerox stocks to the existing stock groups It is advantag...

Page 25: ...cess overview Refer to the on line help for a detailed calibration procedure Prior to initiating the calibration process the stock you plan to use for calibration needs to be in a paper tray and that...

Page 26: ...calibrations are assigned to Stock A with a 175 dot halftone and Stock A with a 200 dot halftone When calibrating 8 5 x 11 A4 stock print 40 single sided copies of the 2 page target For larger sized s...

Page 27: ...agement Guide 3 5 This procedure is more likely to be necessary for iGen3 due to image to page registration errors but may also be applicable for DC20xx 60xx printers Figure 3 1 Calibration target and...

Page 28: ...Stock Management and Calibration 3 6 Color Management Guide Figure 3 3 Calibration step 2 Figure 3 4 Calibration step 3...

Page 29: ...nspecified Stock Name model This workflow is best for customers that have a limited number of stocks and want very consistent color outcomes with very easy system operation Key Points to this approach...

Page 30: ...rays with physical stock attributes selected and name remaining Unspecified Calibrate ANY stock named Unspecified In Printer Manager Paper Trays right click on any tray stock and select calibration Pe...

Page 31: ...k and add the stock from the Stock Catalog to the Stock Library 3 Select your stock in Printer Manager and calibrate if required NOTE The pre installed stocks have 1 of 3 stock profiles Bright White W...

Page 32: ...3r11390 163 97 1 Color Expressions 96 3r11385 105 97 0 Color Expressions 96 3r11387 120 97 0 Color Expressions 96 3r11380 90 96 8 White Digital Color Colotech SuperGloss 3r95451 135 95 0 93 7 L 95 Di...

Page 33: ...ion to force feed from the tray Alternatively you can just program a specific stock for your job NOTE The option to force feed from a tray is not available on the iGen3 3 Submit a job to a hold queue...

Page 34: ...profile each time NOTE After the job proofs it will appear in the inactive jobs list of the Job Manager and will be designated as successfully proofed This is where you will find it the second and thi...

Page 35: ...ne calibration and easy to use color tools to adjust color cast using simple slider bars for lightness contrast and saturation Trapping Black Overprint and anti aliasing can also be applied Expert Col...

Page 36: ...t is made on an image The adjustments are made during the RIP creating the DocuSP CMYK output profile Basic color tools are used when an image requires a global adjustment that can be made by one of t...

Page 37: ...wards Magenta adds magenta by reducing green Moving the slider bar towards green adds green by reducing magenta Yellow vs Blue moving the slider bar towards yellow adds yellow by reducing blue Moving...

Page 38: ...of white around the black object To view the dialog in which to find and set this feature see Figure 4 3 DocuColor iGen3 lays the colors onto the image in a unique manner with black being laid down fi...

Page 39: ...t could be created and applied to every job submitted from that device This saves job preparation time and assures that the same adjustment is made to all jobs submitted from that device Expert color...

Page 40: ...200 for coated stock jobs For DC 20xx 60xx we suggest you use the default profile Image Resample The DocuSP controller provides you with the ability to select an interpolation or image resample metho...

Page 41: ...ler Bi Linear Interpolation A method used to scale image data pixels from one resolution to another The replacement pixel in the scaled image is calculated using a weighted sum of the four nearest pix...

Page 42: ...ing includes profiles for assigning Gray Component Removal GCR GCR is a process for replacing an equal percentage of gray with black reducing the amount of dry ink used You can select a GCR profile fo...

Page 43: ...t color values in the print engine color profile to the input profile taking into consideration the white point of the media Used for color matching such as matching a SWOP proof Use Absolute Colorime...

Page 44: ...and delete custom colors You can print a swatch book of PANTONE Uncoated or PANTONE Coated colors or print a proof of a color being edited Understanding the Spot Color Editor window The Spot Color Edi...

Page 45: ...o print out a full book of PANTONE color swatches Revert Available when an edited PANTONE color is selected this control reverts an edited color back to its original settings Delete Available when a c...

Page 46: ...image 3 A queue is set up with OPI Substitution enabled This feature is found in the Queue Properties PostScript PDF tab 4 A low resolution image is created as an analogue to each full resolution imag...

Page 47: ...ic mode provides pre defined settings that optimize the performance of specific DocuSP based print engines This mode provides a consistent profile conversion path for undefined profiles providing the...

Page 48: ...it is submitted to any Xerox color print engine running in XCC mode XCC standardizes the way the DocuSP controller interprets unknown input color profiles and standardizes the conversion through a Xer...

Page 49: ...solved at the DocuSP or does it need to escalated This troubleshooting module assumes that actions can be taken at the DocuSP to solve the problem Image paths A good place to start troubleshooting is...

Page 50: ...remember Color Adjustments are performed in PCS XYZ thus always invoking the ICC path Calibration and User TRCs are applied in hardware They do not affect RIP performance or color pathway The Xerox En...

Page 51: ...agenta vs Green Yellow vs Blue 0 100 all Cyan vs all Red 0 100 all Magenta vs all Green 0 100 all Yellow vs all Blue 0 100 all Cyan vs all Red 0 100 all Magenta vs all Green 0 100 all Yellow vs all Bl...

Page 52: ...Smart Destination Profile System Specified System Specified Emulation Off Off Rendering Intent Saturation Perceptual Relative Colori metric Absolute Colori metric Pure Images Relative Colorimetric Te...

Page 53: ...lairage an international standards committee L A B is a color space that describes color in terms of human eye response CMYK A color space model that defines the relative amounts of Cyan Magenta Yello...

Page 54: ...color space The jpg files in a print job will need to be converted to CMYK prior to printing Lightness The perceived reflectance of a surface Matte Matte refers to an attribute of a stock which is a...

Page 55: ...B and the R is a saturated Red Source Profile The color profile with which the job was created at the client workstation prior to submission It is often embedded as part of the PDL but if not embedded...

Page 56: ...t basis User TRCs can be applied to all jobs including those that originate as Reprint files Uncoated Uncoated defines whether a stock has been coated or was left uncoated Generally prints on uncoated...

Page 57: ...family 3 4 DC iGen3 3 4 Characterization 3 1 CMYK Native path 2 5 Color manager 2 6 Color paths 2 2 Color profiles 2 7 Color Tools using 4 1 Colored Stock hints 3 11 Custom color mode 2 10 Color Tools...

Page 58: ...face OPI 2 13 P PANTONE path 2 5 Print engine specific mode 2 7 4 13 Q Queue Overrides 2 1 R Rendering 4 8 Rendering intent 2 12 Absolute Colorimetric 4 9 Perceptual 4 9 Pure 4 9 Relative Colorimetric...

Page 59: ...Troubleshooting 5 1 U Unspecified Stock Name Model setup 3 7 User TRCs 2 7 4 4 X XCC mode using 4 13 Xerox consistent color mode 2 9 Xerox Qualified Stocks tips for use 3 3...

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