ColorFlow Training

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If the print response of a print device has changed, you can use ColorFlow to adjust a transfer curve imported from Harmony. 

Tasks

Goal
Adjust an imported Harmony transfer curve and use the updated curve to output a PDF.

Task 1: Edit the transfer curve

  1. In ColorFlow software, click the Print Curves tab.
  2. Select the PRINT Press A CS1 SWOP 175L print curve and click the Copy to Transfer Curve button at the bottom right (you can also drag and drop the curve into the Transfer Curve section).
  3. The new Transfer curve is activated for Prinergy and the original Harmony curve is deactivated.
  4. In the Transfer Curve Properties dialog box on the right, in the Curve Name box, enter XX Harmony Activity 4 Transfer Curve Edit  (where XX= your initials).
  5. Ensure the Show in Prinergy checkbox is selected
  6. In the Device Condition section, enter the following device condition parameters:
    • Screening: 175 Elliptical
    • Substrate: Type 1 or 2 (coated art)
    • Other: None
  7. Leave all other settings in the dialog as defaults.
  8. Click Apply.
  9. In the Viewer window, click the Transfer curve icon .
  10. In the Transfer Curve Adjustments dialog box, click the K button.
    There are 5 sliders represents 5 fixed tonal range: 
    • Slider at 10% (Highlight): affects 0 to 25%
    • Slider at 25% (Quartertone): affects 0 to 50%
    • Slider at 50% (Midtone): affects entire tonal range
    • Slider at 75% (3/4-tone): affects 50 to 100%
    • Slider at 90% (Shadow): affects 75 to 100%
  11. In the box under the Midtone slider, enter 5, to boost the Midtone Black by 5%.
    Note that the other adjustment slider values are all adjusted to smooth out the resulting curve. 
  12. Alternatively, instead of using the Transfer Curve Adjustment sliders, you can click Adjust... click Transfer Curves... and click a point on the selected color to select and edit the Tint Out value for the point by entering the value in the edit field at the bottom of the Curve Values list. (Enable Editing must be checked in the dialog to be able to do this.)
  13. Click Apply.
  14. Click Close
  15. Click OK in the final dialog

Task 2: Output a page using the updated transfer curve in Prinergy

  1. In Prinergy, create a new job, and name it as XX Harmony Activity 4 Transfer Curve Edit (where XX = your initials).
  2. Refine Chart_TintRamp_CMYK.pdf with 1stRef-Normz.
  3. Output the PDF file using Virtual Proof.LoosePage with the updated transfer curve:
    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. Click the ColorFlow Current State radio button.
    5. Confirm that no Plate Curve is selected.
    6. Expand the Print Curve drop down list and select XX Harmony Activity 4 Transfer Curve Edit
  4. Open the generated page in VPS and measure the 50% black patch. 
    Confirm that the updated print transfer curve has been applied and the 50% black patch measures 57.6%. 

Outcome

You have updated a Harmony transfer curve and used it in Prinergy to control the tonal response of an output.

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