Overview

When receiving customer complaints on the tone of printed images, the color gradation correction sheet is a tool for assessing whether the machine is printing images accurately, and making corrections accordingly.

Color gradation correction sheet

Procedure

  • Before performing this procedure, be sure to execute Auto Image Density Adjustment & Colour Calibration.

  • This procedure varies between models depending on the control panel specifications (whether the panel is a fourline panel or touch panel). Read the section for your model.

  1. Execute Adjust Auto Density.
    • For the MF models: [User Tools] icon > [Machine Features] > [Printer Features] > [Data Management] > [Color Calibration] > [Adjust Auto Density]
    • For the Printer model: [Menu] key > [Maintenance] > [Quality Maintenance] > [Auto ImgDensAdj &ColrCalib] > [Color Calibration] > [Adjust Auto Density]

  2. A confirmation message appears. Press [OK] to adjust Auto Density.
  3. After Adjust Auto Density is finished, press [Exit] to return to the [Color Calibration] screen.
  4. Select [Print Test Pattern 1] to print the gradation correction sheet.

  5. Compare gradation correction sheet 1 on the printed test pattern with the color sample, and select the numbers matching the color.

    • As the initial setting, the color values for K, M, and C/Y are set to 3, 3, and 3/3. Cyan and yellow are set as a combined value of C/Y. For example, the following pattern indicates C=5 and Y=2.

  6. After entering the values, print the graduation correction sheet again, and compare it with the color sample.
  7. Check that the settings are correct and save the settings.
  8. Perform gradation correction 2 according to Steps 5 to 7.
Gradation correction sheet (sample)

 

  1. K (black) correction value

    Adjusts the color printed when only black toner is used. The currently set correction value is printed in red.

  2. M (magenta) correction value

    Adjusts the color printed when only magenta toner is used. The currently set correction value is printed in red.

  3. C (cyan)/Y (yellow) correction value

    Corrects the colors printed when cyan and yellow are used. For C/Y (cyan/yellow), the correction value is determined based on a combination of these two colors, although panel settings are configured for each color.

  4. Setting value

    The value displayed is the one currently set when the gradation correction sheet is printed. This value matches the one set on the control panel.