ColorFlow Training

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If the response of a plate has changed, you can edit an imported Harmony plate curve in ColorFlow to linearize it again.

Tasks

Goal
Update a imported Harmony plate curve in ColorFlow and use the updated curve to output a PDF.

Task 1: Edit the Harmony plate curve in ColorFlow

  1. In ColorFlow, click the Plate Curves tab.
  2. In the Harmony Curves section, select the PLATE XL Euclidean 150 DERIVED curve imported in Activity 1.
  3. Click Copy to Calibration Curve.
  4. Define a new plate curve setup by entering the following:
    • In the Device Type box, select Offset Press
    • In the Plate Type box, select Kodak Thermal Gold
    • In the Screening box, select 20u Staccato or add the value to the list if it doesn't exist:
      • Click the Edit button  
      • Click the Add button 
      • Enter 20u Staccato
    • In the Plate Line box, select Trendsetter or add the value to the list if it doesn't exist
  5. Click OK.
    The curve appears in the Calibration Curve table. Note that the check box of Show in Prinergy Plate Curves is cleared for the original imported Harmony plate curve and is selected for the newly-created plate curve. 
  6. The copied plate calibration curve is automatically named using all the elements in the device condition. You can rename the curve for simplicity. Click in the Name box, select the text and change the name to Kodak Thermal Gold 20u. Press Enter to set the curve name.
  7. Make sure the Curve is selected.
    A Data panel is visible on the right.
  8. Add a custom tint set:
    1. Click Tint Set...
    2. Click the Add button .
    3. Enter 50.

  9. In the Measured Plate Response box, update Dot Area values for each Tint In. In a real-life situation, you would output an uncalibrated plate containing a plate calibration target in Prinergy and measure the plate response for each tint value. For the purpose of this training, enter 55 to reflect the plate is gaining 5% at the 50% tone.

  10. Click Apply.
  11. Click Plate Response to display a graph of the measured values.
  12. Click Plate Curve to display a graph of the calibration values that will be applied in Prinergy.

Task 2: Use your updated plate calibration curve to refine and output a page in Prinergy

  1. In Prinergy, create a new job, and name it XX Harmony Activity 2 Update (where XX = your initials).
  2. Refine Chart_TintRamp_CMYK.pdf with 1stRef-Normz.
  3. Output the PDF file using Virtual Proof.LoosePage with one of the plate curves you just imported:
    1. In your Virtual Proof.LoosePage Process template dialog box, from the Output To list, select Virtual Proof.
    2. Leave ColorFlow Color Relationship Management unchecked.
    3. Expand the Calibration & Screening panel.
    4. Select the ColorFlow Current State radio button.
    5. Expand the Plate Curve drop down list and select the Kodak Thermal Gold 20u curve 
  4. Output the file, open the output file in VPS and measure the 50% black patch. 
    Confirm that the updated plate calibration curve has been applied and the 50% black patch measures 45%. 

Outcome

You have updated an imported Harmony plate curve and used the updated curve in Prinergy to control the tonal response of a plate.

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