A simulation of the printing process check can be made using the profile data. Using the theoretical L*a*b* values given by the profile, and comparing them to the Standard expected ones, the Print Standard Verification tool gives you a theoretical idea of the result you should obtain.

Procedure to simulate a standard verification

1. Open EasyMedia and select the printer calibration.

2. Search your printer in the list then select the media and the printing configuration you want to check (mode, resolution, and quality). Click then on Next to open your project.

3. It opens on the Status tab. Move to the Standards tab then select Control Compliance to Standards. Click on Next.

4. First, select the group of standards you want to check among Digital, PSD, ISO, and G7®.

5. Choose the measurement device in the list, the control target, and the input profile (for the Digital group) or the grayscale target (for the G7® group) you want to use to do the check.

6. Select in the bottom menu: Use the current profile for simulation. Then click on Next.

7. Then EasyMedia calculates the theoretical La*b* values and displays the compliance to the standards.

Results interpretation

Once the control target has been measured, a summary of the notes obtained is displayed. The color code is simple:

You can also use the standard list to move from one standard to another or to go back to the summary.

Standard constraints

Each standard constraint appears on the left column and they are built on this model (more details after):

<Constraint type> <Associated Delta> : <Calculated value> <Reference value>

• Some constraints are not mandatory to get the certification, but still, they are all displayed under the informative bloc.
• Normative constraints are needed to pass the certification.
• Gamut constraints are pre-requirements that are obligatory and tested before normative constraints.

Color mode

• When the constraint is followed, the calculated value is displayed in green:

WK Maximum dE76: 0 (<=3)

• If the constraint failed with less than 1 unit, the calculated value is displayed in orange:

CMYK Maximum dH:   2.8 (<=2.50)

• If the constraint fails, the calculated value is displayed in red and a click on the line displays all the swatches that failed:

Maximum dE76:   10 (<=6)

Available actions

Depending on the chosen constraint, a click on its line selects the linked swatch/swatches in the control target.

• Maximum selection: when a line searching for the maximum is clicked, the corresponding swatch is automatically selected, and its information is displayed in the Details tab.

We selected the 95% ∆E00 swatch with the Delta E76 maximum.

• Group selection: when a line calculating an average on a group of swatches is clicked, the corresponding swatches are automatically selected. The “Grey” group contains grey swatches made with only Cyan, Magenta, and Yellow, without Black addition.

If you click on one of the group swatches, the group will still be selected while your selected swatch will blink:

We selected the “Grey Average dC” group.

• Media swatch selection: the Media Color lines refer to a particular swatch from the control target: the color of the substrate is simulated by the profile and printed. group. Clicking on a line that begins with Media Color selects that particular media swatch.

We selected the media swatch using the Media Color dC line.

Swatches

Each swatch from the control target is displayed and can be clickable. When clicked, its information is displayed in the Details tab and you will be able to see:

• The color values will depend on the chosen mode (CMYK, CMYKcmk, CMYKOG, etc.)
• L*a*b* reference values (the ones that are expected)
• L*a*b* measured values
• The calculated Deltas

The kind of Delta calculated depends on the targeted standard (ISO, Fogra, etc.). Don’t be surprised if the constraints and the number and Delta types used are different between the two standards

The Delta, whatever it is E76, E00, H, L, a, b,  represents the distance between the measured color and the attended one.

Delta list

• dE76 (CIE dE 1976): Euclidean distance in the La*b* reference.
• dE00 (CIE dE 2000): in the La*b* reference, a distance that takes into account human color perception.
• da: the difference between the a* values (red-green axis).
• db: the difference between the b* values (yellow-blue axis).
• dL: the difference between the L *values (light).
• dC: in the LCH reference, the difference between the Chroma values.
• dH: in the LCH reference, the difference between the Hue values.
• wdL: check the grey gradient regularity between the white point and the black point (according to the light)
• wdC: check the composite grey conformity between the white point and the black point (according to the chroma)
  

Examples

ISO 12647-7

Fogra PSD 2022 Media-Relative

Data export

On the standard summary page, four buttons are available to export the information in a specific file format and with a specific layout:

• XML: Export the information in an XML file.
• Sticker: Export the information in a basic PDF file (criteria, measures, achievement).
• PDF: Export the information in a PDF file with all the standard data.
• HTML: Generate an HTML file to display the information in a web browser When you click on one of these buttons, you are then able to select the location for the file saved and its name.

When you click on one of these buttons, you are then able to select the location for the file save and its name.