Toshiba GA-1121 manual An overview of calibration, Understanding calibration, Color Calibration

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22-2

Color Calibration

NOTE: The procedures described in this chapter are fundamentally the same for Windows and Mac OS computers. The main differences are the interface cable and the port used to connect to the measurement instrument. The illustrations in this chapter describe the Windows version.

NOTE: The term computer is used to refer to any computer running ColorWise Pro Tools.

An overview of calibration

Calibration generates curves that adjust for the difference between the actual toner densities (measurements) and the response expected by the output profile.

•Measurements represent the actual color behavior of the copier/printer.

•Calibration sets are sets of measurements.

•A calibration target that describes the expected behavior of the copier/printer is contained in each output profile.

After you have calibrated the GA-1121, a calibration set is stored. This calibration set will be used when it is associated with an output profile. Every output profile has an associated calibration set. If you have not specified one, the calibration set associated with the default output profile is used.

If you change the calibration after a saved job has been processed (RIPped), you do not need to reprocess (reRIP) the job. The new calibration affects the job without needing to be reprocessed.

NOTE: Changing calibration has the potential to affect all jobs for all users, so consider limiting the number of people authorized to perform calibration. Set an Administrator password in GA-1121 Setup to control access to calibration (see the Configuration Guide).

Understanding calibration

Although most users’ needs are met by the default calibration set, the GA-1121 allows you to choose a calibration set to customize calibration for specialized jobs.

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Contents Toshiba GA-1121 About the Documentation Part Number Avis de Conformation Classe a de l’Industrie Canada Software License Agreement Limitation of Liability Contents Using the EFI Densitometer ED-100 Viii Contents Using CalibratorUsing the EFI Spectrometer ES-1000 Using Spot -OnUsing the X-Rite DTP41 spectrophotometer ContentsColor Setup Using the X-Rite DTP32 densitometerPage About this manual IntroductionAbout this manual Key features of ColorWise Xii IntroductionXiii Key features of ColorWise Page 11-1 Managing color on the GA-1121 Chapter GA-1121 Color ManagementManaging color on the GA-1121 11-2 GA-1121 Color Management RGB data Cmyk data Spot color data11-3 Managing color on the GA-1121 GA-1121 color print option What it doesAutomatic/Off/On/Below 90-300 ppi Output profile is applied to all data in the print job see EFIRGB/sRGB PC Rendering Style 11-7 Managing color on the GA-1121Input Pure Black Text/Graphics Pure Black Text/Graphics11-8 GA-1121 Color Management OffBlack Overprint 11-9 Managing color on the GA-1121Spot Color Matching 11-10 GA-1121 Color ManagementRGB Source Profile Cmyk Simulation Profile 11-12 GA-1121 Color ManagementCmyk Simulation Method 11-13 Managing color on the GA-1121RGB Separation 11-14 GA-1121 Color Management11-15 Managing color on the GA-1121 Output profileCombine Separations 11-16 GA-1121 Color Management PostScript printer driver for Windows and Mac OSToner Reduction 11-17 PostScript printer driver for Windows and Mac OS Setting color management print options for WindowsClick Update to display the current GA-1121 settings Adobe PostScript printer driver for Mac OS 11-18 GA-1121 Color ManagementSetting color management print options 11-19 PostScript printer driver for Windows and Mac OS11-20 GA-1121 Color Management Choose Color/Grayscale from the Print Color menuPage Print dialog box, choose Printer Features from the menu 11-22 GA-1121 Color ManagementChapter 22-1 An overview of calibration22-2 Color Calibration An overview of calibrationUnderstanding calibration How calibration works 22-3 Understanding calibrationScheduling calibration 22-4 Color CalibrationChecking calibration status Using Calibrator22-5 Using Calibrator Start ColorWise Pro Tools and connect to the GA-1121 Starting Calibrator22-6 Color Calibration Click CalibratorExpert Mode 22-7 Using Calibrator22-8 Color Calibration Restoring default calibration measurements 22-9 Using CalibratorUsing the EFI Spectrometer ES-1000 Setting up the ES-1000Start Calibrator 22-11 Using the EFI Spectrometer ES-1000Calibrating the GA-1121 with the ES-1000 Generate Measurement Page pane, click PrintCheck the settings, and click Measure 22-13 Using the EFI Spectrometer ES-1000 Place the ES-1000 in the calibration cradle, and click OKUsing the EFI Densitometer ED-100 Setting up the ED-10022-15 Using the EFI Densitometer ED-100 Calibrating the GA-1121 with the ED-100Choose the appropriate options, and then click Start 22-17 Using the EFI Densitometer ED-100 22-18 Color Calibration Repeat to measure each successive patch on the MeasurementChoose the appropriate options, and click Print Calibrating the GA-1121 with the DTP4122-19 Calibrating the GA-1121 with the DTP41 22-20 Color Calibration Click Read Strip Calibrating the GA-1121 with the DTP32 22-22 Color CalibrationClick Measure Using AutoCal and ColorCal 22-25 Using AutoCal and ColorCal 22-26 Color Calibration Calibrating from the Control Panel with AutoCal or ColorCal When prompted, choose Yes to print the measurement With Expert Mode, you can print a Comparison Page seeOn the Control Panel, press Set To Remove Calibration from the Control Panel Chapter ColorWise Pro Tools 33-1Profile Manager 33-2 ColorWise Pro ToolsStart ColorWise Pro Tools and click Profile Manager Setting the default profiles33-3 Profile Manager Repeat steps 2 through 4 for each type of profile Downloading profiles33-4 ColorWise Pro Tools Start ColorWise Pro Tools and click the Profile Manager33-5 Profile Manager 33-6 ColorWise Pro Tools Editing profilesManaging profiles Defining profiles To Define a Custom Simulation Profile 33-9 Profile Manager Color Editor 33-10 ColorWise Pro Tools33-11 Color Editor Page Page Use the plus and minus buttons to adjust brightness 33-14 ColorWise Pro Tools33-15 Color Editor ColorWise Pro Tools Undoing Cmyk simulation edits Checking edited profiles33-18 ColorWise Pro Tools Using Spot-OnStarting Spot-On Click Test Print from the Color Editor windowUsing the Spot-On main window 33-19 Using Spot-On33-20 ColorWise Pro Tools 33-21 Using Spot-On Working with existing colorsChoose Find from the Edit menu Enter the name of the color you want to find and click OKCreating custom colors New color group entry or color entry appears as Untitled33-24 ColorWise Pro Tools Downloading custom color groupsUploading custom color groups Locate and select the desired color group, and click Open33-25 Using Spot-On Editing color values33-26 ColorWise Pro Tools 33-27 Using Spot-On Select how you want to enter the Cmyk values ColorWise Pro Tools Click OK to print the patchesClick the center patch in the Spot-On Color Search window Choose Start from the Instrument menu Using a measurement instrument to target colors33-29 Using Spot-On Saving changes and exiting Spot-On 33-31 Color Setup Color SetupSetting default ColorWise options 33-32 ColorWise Pro Tools Appendix a Color Measurement Instruments Using the X-Rite DTP41 spectrophotometerSetting up the DTP41 AA-1 Color Measurement InstrumentsLED indicator Unused connector Connect to serial port Calibrating the DTP41 AA-5 Color Measurement Instruments Click Calibrate DTP-41 AA-6 Color Measurement InstrumentsClick Utilities Click Done Close the Utilities window AA-8 Color Measurement Instruments Using the X-Rite DTP32 densitometerSetting up the DTP32 Interface cable Calibrating the DTP32 AA-11 Color Measurement Instruments Page BB-1 Importing density measurements Appendix BSimple Ascii Import File Format Saiff BB-2 Importing density measurements Example of 1D Status T density for EFI 34 patchExample of 1D Status T density for EFI 21 patch Example of 1D Status T density for an arbitrary BB-3 Importing density measurementsPage Index Index DTP41DTP41 2-19 to 2-22, A-1 to A-7 Index