Background

ColorFlow provides several built-in CMYK reference device conditions that encapsulate the color response of industry specifications or printing aim points.  If you want to use an arbitrary color response that you have measured from a printed sample, such as a supplied proof or purchased reference sheet, you can create a custom CMYK reference device condition. This activity is to create a print calibration curve to match a custom specification that you create.

Tasks

Goal
Create a custom CMYK device condition using a set of measurement data and then refine a print calibration curve that you created in a previous activity to match the custom CMYK device condition.

Task 1: Create a custom CMYK device  condition

  1. Click the Device Conditions tab.
  2. Click the Add button .
  3. Drag the CMYK Reference to the viewer window.
  4. Click the Properties icon  .
  5. In the Name box, enter XX custom device condition (where xx = your initials).
  6. Click OK.
  7. Create a Tint Ramp chart:
    1. Click the Measurement icon  .
    2. In the Charts section, click the Add button .
      A chart appears in the Charts list with a default name.
    3. From the Chart Type list, choose Tint Ramp
    4. In the Tint Set section, click the Edit button .
    5. Click the Add button   and enter 0 10 25 50 75 90 100.
    6. Click OK.
    7. Click Save.
  8. Enter the measurement value:
    1. Click Measure.
    2. Click Enter manually.
    3. In the Channels Binding section, click C, M, Y, K Same.
    4. In the Tonal Response section, enter the following EDA values:

      Tint inEDA
      00
      1014
      2534
      5069
      7584
      9094
      100100
    5. Click OK and close the Device Measurements dialog box.

  9. In the Device Condition list table, find the CMYK device condition you just created and select the Show in Target Lists check box.

Task 2: Redefine the print curve target

  1. In the Calibration Curves table list, click XX new print calibration curve for tonal match to show it in the viewer window.
  2. Click the Conversion icon .
  3. Click Redefine.
  4. Click the  Process Inks  tab and choose XX custom device condition  from the  Target  list.
  5. From the Curves Method list, choose Tonal Match.
  6. Click OK.
    A print calibration curve is generated to match the custom device condition you created. 

Task 3: Output a job using the newly created print calibration curve

  1. In Prinergy, create a new job, and name it as XX tonal match for custom spec (where XX = your initials).
  2. Refine Chart_TintRamp_CMYK.pdf with 1stRef-Normz.
  3. Output the PDF file using Virtual Proof.LoosePage with the print curve you just created:
    1. In your Virtual Proof.LoosePage Process template dialog box, from the Output To list, choose Virtual Proof.
    2. Leave ColorFLow Color Relationship Management unchecked.
    3. Expand the Calibration & Screening panel.
    4. Click the ColorFlow Current State radio button.
    5. Expand the Print Curve drop down list and select curve XX new print calibration curve for tonal match .
  4. Open the generated page in VPS and measure the 10%, 25%, 50%, 75%, and 90% black patch. 
    Confirm that the plate calibration curve has been applied: 10% measures 10.7; 25% measures 30.8; 50% measures 59.9; 75% measures 79.4; 90% measures 89.6.

Outcome

You have created a print calibration curve to tonal match a custom specification.

Contents