Executing Advanced Calibration (G7)

Assumed environment and workflow

•Intended Environment

Operating system

Windows 7

Application

Color Centro 2.1

Image controller

Image Controller IC-604

Color Density Control

Off

Colorimeter

i1Pro

Paper type and thickness

Coated GL (A3), 128 g/m2 / 33 lb Bond

* The sample screen may be different from the actual display depending on your system environment and application version/revision.

•Workflow

Measuring the Calibration Accuracy and Checking the Results

Executing advanced calibration (G7)

Measuring the Calibration Accuracy and Checking the Results

After executing controller calibration, measure the calibration accuracy.

After measurement, check the CMYK density, gray balance, and other results to determine whether advanced controller calibration is necessary.

  1. Execute the controller calibration with Color Centro.

    • supplementary explanationIf you are using registered calibration data or current calibration data without executing calibration, start from Step 2.

  2. On the Calibration Manager screen, click Accuracy Measurement under 2. Calibration.

    The Accuracy Measurement of Calibration screen is displayed.

  3. Click Print.

    Print the color chart that is to be measured using the instrument.

  4. On the Print Chart screen, set the Copies and Paper Tray. After setting, click Print.

    Example:

    Item

    Setting

    Copies

    1

    Paper Tray

    Tray 1

    A test chart is printed. On the chart, Print Date, Output Number of Sets, and No. are printed.

  5. Connect the instrument to the computer and click Start.

    Example: The i1Pro is connected.

    • supplementary explanationThe device driver for the instrument must be installed on your computer beforehand. For details, refer to the instrument's manual.

    Calibration accuracy measurement starts.

  6. Measure the chart using the instrument.

    For details about the chart measurement operation, refer to About Controller Calibration.

  7. Check the measurement results (CMYK density and Gray Step) on the Calibration Manager screen.

    CMYK Density:

    Check whether the D-Max (maximum density) under Measure is in its appropriate range. Check whether the Target and Density (after Calibration) in the graph are close.

    Gray Step:

    Based on the Gray Balance, Delta-L*, Δa*, Δb*, and ΔCh values, check the gray reproducibility.

Executing advanced calibration (G7)

By executing the G7 calibration, you can apply the correction to the controller for enhanced color reproduction accuracy.

  1. On the Calibration Manager screen, click Start G7 Calibration under 3. G7 Calibration.

    The Start G7 Calibration screen is displayed.

  2. Click Print.

    Print the color chart that is to be measured using the instrument.

    A test chart is printed.

  3. Click Start.

  4. Measure the chart using the instrument. After you finish the chart measurement, click Register.

    Example: Measurement is performed using i1Pro.

    • supplementary explanationBy registering the acquired calibration data in the image controller, this data can be applied when printing.

  5. Click OK on the Information screen.

    The calibration table is registered in the image controller.

  6. On the Calibration Manager screen, click Accuracy Measurement under 3. G7 Calibration.

    The Accuracy Measurement of G7Calibration screen is displayed.

  7. Click Print.

    Print the color chart that is to be measured using the instrument.

    A test chart is printed.

  8. Click Start.

  9. Measure the chart using the instrument. After you finish the chart measurement, click OK.

    • supplementary explanationWhen the values of ΔCh and ΔE* are not standard as the result of the accuracy check, the dialogue is displayed. You can choose to recalculate and register the calibration table to fit in the target range or register as is in the dialogue. When you recalculate, you can print the report about the current correction data before executing.

    • supplementary explanationWhen you recalculate, you are recommended to return to Step 6 to measure the accuracy after executing.

  10. Check the measurement results (CMYK density and Gray Step) on the Calibration Manager screen.

    When the calibration accuracy measurement is completed, the measurement results for CMYK density and Gray Step (gray balance) are displayed.
     CMYK Density:
    Check whether the D-Max (maximum density) under Measure is in its appropriate range. Check whether the Target and Density (after Calibration) in the graph are close.
     Gray Step:
    Based on the Gray Balance, Delta-L*, Δa*, Δb*, and ΔCh values, check the gray reproducibility.

    • supplementary explanationWhen Report Print is clicked, the measurement results for G7 calibration is printed.