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HP Designjet T770 and T1200 Printer Series - Color calibration

Color calibration
Color calibration enables your printer to produce consistent colors with the particular printheads, inks and paper type that you are using, and under your particular environmental conditions. After color calibration, you can expect to get similar prints from any two different printers situated in different geographical locations.
Some paper types cannot be calibrated. For all other paper types, calibration should be done in any of the following circumstances:
  • Whenever a printhead is replaced
  • Whenever a new paper type is introduced that has not yet been calibrated with the current set of printheads
  • Whenever the environmental conditions (temperature and humidity) change significantly
You can check the color calibration status of the currently loaded paper at any time by pressing the View information key on the front panel. The status may be one of the following:
  • PENDING: the paper has not been calibrated.
      note:
    Whenever you update the printer's firmware, the color calibration status of all papers is reset to PENDING.
  • OBSOLETE: the paper has been calibrated, but the calibration is now out of date because a printhead has been replaced, and should be repeated.
  • DONE: the paper has been calibrated, and the calibration is up to date.
  • DISABLED: this paper cannot be calibrated.
      note:
    Color calibration cannot be performed on plain paper, nor on any kind of transparent material.
You can also check the color calibration status by using the HP Utility.
You can start color calibration in the following ways:
  • From the HP Utility for Windows: select Color Center > Calibrate paper, and choose the paper to be calibrated.
  • From the HP Utility for Mac OS: select Paper Preset Management from the HP Color Center group, choose the paper to be calibrated, press the button and select Calibrate Paper.
  • From the front panel: select the Image Quality Maintenance menu icon , then Calibrate color.
The calibration process is fully automatic and can be performed unattended after you have loaded paper of the type you wish to calibrate—which should be A4 or any larger size. The paper on the active roll will be calibrated; you should ensure that the roll you want to calibrate is active. To change the active roll, select the Paper menu icon , then Select active roll.
The process takes about 3–5 minutes and consists of the following steps.
  1. A calibration chart is printed, which contains patches of each ink used in your printer.
    Figure : Color calibration chart
  2. The chart is allowed to dry for a period of time that depends on the paper type, so that the colors have time to stabilize.
  3. The chart is scanned and measured.
  4. From the measurements, the printer calculates the necessary correction factors to apply for consistent color printing on that paper type. It also calculates the maximum amount of each ink that can be applied to the paper.

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