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2
2-1 An overview of calibration
Calibrating the GA-1121 ensures consistent, reliable color output. This chapter
explains how calibration works and provides instructions for all calibration procedures.
You can calibrate the GA-1121 using ColorWise Pro Tools in combination with any of
the following color measurement instruments:
• EFI Spectrometer ES-1000 hand-held spectrometer
• EFI Densitometer ED-100 hand-held densitometer
• X-Rite DTP41 automatic scanning spectrophotometer
• X-Rite DTP32 automatic scanning densitometer
By connecting one of these instruments to a serial or USB port on your computer, you
can quickly measure calibration color patches and download measurements to the
GA-1121.
NOTE: To use the ES-1000 or ED-100 with a Mac OS computer, you must connect
the instrument to a USB port. You also need an adaptor to connect the ES-1000 or
ED-100 to the Mac OS computer. For more information, contact your service
technician/representative. For information on setting up and operating the DTP41
and DTP32, see Appendix A.
Another way to obtain measurements is by using the copier/printer’s built-in scanner
as part of AutoCal
™
or ColorCal
™
, which do not require the use of a measurement
instrument and can be run from ColorWise Pro Tools or the GA-1121 Control Panel.
When choosing a calibration method, keep in mind that methods using a color
measurement instrument such as the ES-1000, DTP41, or DTP32 are generally the
best. We recommend using the ES-1000 because it captures measurements very
accurately and quickly, can be used to calibrate and profile printers using pages with
randomized patches, and can be used to measure and adjust individual spot colors.
For information on advanced calibration and simulation features available with
ColorWise Pro Tools, such as editing profiles and creating custom profiles, see
Chapter 3. A format for inputting color measurements from other densitometers is
described in Appendix B.
Chapter 2:
Color Calibration