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Perform the G7® Grayscale test

With PRISMAsync Print Server, you can verify if the printed output meets the G7® Grayscale target.

The G7® Grayscale test applies to all media of the media family. You only have to perform a G7® Grayscale test for one media of the media family. This is the media that is also used for media family calibration. Make sure you use that same media each time you perform a G7® Grayscale test.

Tools

i1Pro3 spectrophotometer (i1Pro2 also supported)

Before you begin

  1. Calibrate the printer.

    IMPORTANT

    You must always perform a printer calibration before you continue with this procedure.

  2. Calibrate the media family of the media you want to validate.

    IMPORTANT

    You must always perform a media family calibration before you continue with this procedure.

Procedure

  1. If applicable, connect the i1Pro3 spectrophotometer to the USB port of the control panel.

  2. Touch [System]  → [Color adjustment]  → [Idealliance® G7® Grayscale test] .

  3. Select a G7® media family.

  4. Select the media for the test.

    The system displays the default media.

  5. Load the media you selected.

  6. Touch [OK].

  7. Follow the instructions on the control panel.

Result

After you performed the G7® Grayscale test, the feedback window shows the results of the performed procedure.

Feedback window of G7® verification procedure

When you see two green checkmark icons, touch [OK] to continue.

When you see a red cross icon, use the table below to evaluate the result before you click [OK] to continue.

Description

The [G7® grayscale verification] information is an indication for the color accuracy achieved with the current printer condition, used media and corresponding output profile.

The graph shows per color channel how close the measured values meet the G7® target values. The tolerances are displayed by dashed lines.

Evaluation

  • When the average ΔL or ΔCh value is less than the set threshold the color quality is fine.

  • When the average ΔL or ΔCh value is greater than the set threshold, examine the printed output carefully. There can be something wrong with the measurement, the media or the printer condition.

Description

The ΔE values of the [Measurement accuracy] information are indicators for the accuracy by which the patches are printed and measured.

The control panel displays a heatmap whose patch locations correspond with the printed chart.

Evaluation

  • When the average ΔE value is less than the [Value where heatmap turns green] value the patches on the control panel turn green and the color quality is fine.

  • When the average ΔE value is between the [Value where heatmap turns green] value and the [Value where heatmap turns red] value, the patches on the control panel turn orange-like and the color quality can still be fine. However, you might want to try the options in the list below.

  • When the average ΔE value is greater than the [Value where heatmap turns red] value the patches on the control panel turn red. You are advised to try one or more options in the list below.

Options to improve color quality

  • Check the patch on the printed chart

    On the control panel, use the > and < symbols to scroll through the calibration charts. Use the zoom symbol to zoom in or out.

    Then, touch the red patch to find the row and column number to check the corresponding patch on the printed chart to solve the problem. Then, perform this verification procedure again.

  • Calibrate the media family again

    Something may have gone wrong during the use of the i1Pro3 spectrophotometer.

  • Calibrate the printer

When you want to print a detailed report of the performed G7® Grayscale test, touch [OK].

Option to print a detailed report

You can also download a detailed report of the performed G7® Grayscale in the Settings Editor.

Location: [Support]  → [Troubleshooting]  → [Download Idealliance® G7® Targeted test report in PDF format]  .

Example of G7® Grayscale test report

More information

Parent topic:
Manage media families and output profiles
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