11-12 GA-1120 Color Management - Toshiba

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1-10 GA-1120 Color Management The CMYK Simulation Profile setting you specify depends on the press standard for which the CMYK data was separated. • For images that were separated using a custom separation (such as a separation produced with an ICC profile), choose the corresponding profile on the GA-1120 with the CMYK Simulation Profile setting. • For images that were separated for SWOP, choose SWOP as the CMYK Simulation Profile setting. NOTE: To properly simulate a printed image that was separated through the use of an ICC profile, the same profile must be present on the GA-1120. For more information about downloading ICC profiles to the GA-1120, see “Downloading profiles” on page 3-4. The ColorWise Off settings send unconverted CMYK data directly to one of the two uncalibrated modes available on the copier. ColorWise Off-Gamma produces a density curve similar to that of an offset printer. ColorWise Off-Linear yields a straight line density curve. The ColorWise Off settings are designed for specific applications only. For example, Calibrator (one of the ColorWise Pro Tools) prints its patch pages using the Gamma mode. Avoid using uncalibrated modes for generic printing because other color settings and printing overrides may be incompatible. CMYK Simulation Method The CMYK Simulation Method lets you 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 pleasant 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 will be used as press proofs. Other techniques offer more color simulation accuracy, which is expected 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. Full (Source GCR) is therefore an excellent simulation technique for the highest quality press proofing applications.
1-11 Managing color on the GA-1120 • Full (Output GCR) is also 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 appropriate for most documents designed for the press, but reproduced on your copier. Output profile The output profile is applied to all data in the print job, so make sure the selected profile is the right one for your job. The default output profile consists of both a profile for your copier, describing its color characteristics, and a calibration target that describes the expected behavior of the copier. In certain cases, you may want to customize the default output profile using the ColorWise Pro Tools Color Editor to achieve particular color effects (see page 3-10). If you do so, the new customized output profile is applied to all data in the print job. Changing the output profile only does not affect its associated calibration target (since the target is based on a copier model). You can edit D-Max values of the calibration target separately (see page 3-6). You can use the ColorWise Pro Tools Profile Manager to download your own output profile to the GA-1120 (see page 3-4). Downloaded output profiles are at first associated with the calibration target that is tied to the default output profile. As mentioned above, you can edit calibration target D-Max values separately. If you are printing with the PostScript driver from a Windows computer and have enabled two-way communication, the name of each downloaded or custom profile is represented in the Output Profile setting pop-up menu. If you are printing with the AdobePS driver from a Mac OS computer, downloaded or custom profiles appear as Output-1 through Output-10. For more information on two-way communication, see the User Software Installation Guide. Pure Black Text/Graphics The Pure Black Text/Graphics option affects the printout for black text and vector graphics on a page. Under most circumstances, it is preferable to leave this option set to On. When Pure Black Text/Graphics is on, black colors generated by applications
Page 1 and 2: TOSHIBA GA-1120 COLOR GUIDE
Page 3 and 4: Copyright © 2002 Electronics For I
Page 5: Proprietary Rights You acknowledge
Page 8 and 9: viii Contents Starting Calibrator 2
Page 11 and 12: Introduction xi About this manual T
Page 13: xiii Key features of ColorWise Colo
Page 16 and 17: RGB data CMYK data Spot color data
Page 18 and 19: RGB Separation Output/Simulation 1-
Page 20 and 21: 1-6 GA-1120 Color Management select
Page 22 and 23: 1-8 GA-1120 Color Management If you
Page 26 and 27: 1-12 GA-1120 Color Management are p
Page 28 and 29: 1-14 GA-1120 Color Management • O
Page 30 and 31: Choose ColorWise 1-16 GA-1120 Color
Page 32 and 33: 1-18 GA-1120 Color Management Setti
Page 34 and 35: 1-20 GA-1120 Color Management 3. In
Page 36 and 37: 2-2 Color Calibration An overview o
Page 38 and 39: 2-4 Color Calibration Output profil
Page 40 and 41: 2-6 Color Calibration Starting Cali
Page 42 and 43: Calibration methods appear here 2-8
Page 44 and 45: 2-10 Color Calibration Restoring de
Page 46 and 47: 2-12 Color Calibration 8. Click Mea
Page 48 and 49: 2-14 Color Calibration Calibrating
Page 50 and 51: Indicator light Sample aperture (un
Page 52 and 53: 2-18 Color Calibration In the Paper
Page 54 and 55: 2-20 Color Calibration When the pat
Page 56 and 57: 2-22 Color Calibration 5. Choose th
Page 58 and 59: 2-24 Color Calibration Calibrating
Page 60 and 61: 2-26 Color Calibration TO REMOVE CA
Page 62 and 63: 3-2 ColorWise Pro Tools NOTE: If yo
Page 64 and 65: 3-4 ColorWise Pro Tools 4. Click OK
Page 66 and 67: 3-6 ColorWise Pro Tools TO BACK UP
Page 68 and 69: 3-8 ColorWise Pro Tools TO DEFINE A
Page 70 and 71: 3-10 ColorWise Pro Tools Simulation
Page 72 and 73: 3-12 ColorWise Pro Tools 4. For a s
Page 74 and 75:
A curve with this shape makes a col
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3-16 ColorWise Pro Tools TO EDIT A
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3-18 ColorWise Pro Tools TO CORRECT
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3-20 ColorWise Pro Tools 8. In the
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3-22 ColorWise Pro Tools Color Setu
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Appendix A: Color Measurement Instr
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Unused connector A-3 Color Measurem
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A-5 Color Measurement Instruments 6
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A-7 Color Measurement Instruments 7
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Unused connector Connect to compute
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A-11 Color Measurement Instruments
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B-2 Importing density measurements
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Index A Absolute Colorimetric rende
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I-3 Index calibration sets for 2-3,
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