Page tree
Skip to end of metadata
Go to start of metadata
Note: The spot ink named "Default" is the default curve channel that is used for undeclared spot inks.
  1. In the Device Condition Properties dialog box, in the Spot Inks section, click the Add button .
  2. Double-click the Color column and choose a suitable color (for visual recognition only).
  3. Click the Name  column and enter the name of the spot ink, such as Pantone 236 C.
  4. Do one of the following:
    • Click the Curve column and choose a curve channel to be used for the spot ink
    • To create a custom curve channel, select Custom. The custom curve is identical to the curve channel previously selected for the spot ink and can be adjusted without affecting other curve channels
  5. Click OK. A curve channel is added for the spot ink.
  6. Measure the tonal response of the spot ink using a tint ramp chart. If you don't measure the spot ink, a linear curve is generated and you can adjust it following instructions in Step 7.
    If you are using a tint ramp chart to measure CMYK and you are adding spot inks when you define the device condition, the spot ink colors appear in the CMYK tint ramp chart and can be measured along with the CMYK colors. If you are adding spot inks after you have characterized the device condition or you are not using a tint ramp chart to characterize the device condition, follow the instructions below to measure spot inks:

     To measure spot inks using a ColorFlow-generated tint ramp chart:
    1. Click the Measurement icon .
    2. In the Charts section, click the Add button .
    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 the desired tint set value.
    6. Click OK.
    7. From the Process Ink Set list, choose None (spot inks only).
    8. Click Save.
    9. Export and print the chart using Prinergy.
    10. Select the chart in the Charts section and click Measure.
    11. Follow the wizard steps.
    12. To measure spot inks using a tint ramp chart not created in ColorFlow:


      1. Click the Measurement icon .

      2. Click the Measurement tab.

      3. Click View.

      4. Click Spot.

      5. Click Measure.

      6. Follow the wizard steps.

     To manually enter spot ink measurements:
    1. Click the Measurement icon .
    2. Click the Measurement tab.
    3. Click View.
    4. Click Spot.
    5. From the Spot Ink list, choose the desired spot ink.
    6. Select the Tonal Response Metric that your device supports. It will be either: Murray-Davies Effective Dot Area (supported by most densitometers) or Spot Color Tone Value (preferred).

    7. In the Tonal Response table, double-click the EDA column of a desired tint in and enter the measured tonal value.
  7. You can adjust a spot ink device curve channel if required.

     To adjust the spot ink curve:
    1. Click the Device Curves icon
    2. Click Spot and use the Spot Ink control to select the specific spot ink.

      Below the Curve Change graph, there are several sliders that represent different points in the tonal range:   

      Slider

      Tint In Range (non-flexo)

      Tint In Range (flexo)

      Most affectedAffectsMost affectedAffects
      MindotDoes not appearDo not appearMindot Tint InMindot to 25%
      Highlights10%0 to 25%10% to 15%Mindot to 25%
      Quartertones25%0 to 50% 25%Mindot to 50%
      Midtones50%0 to 100%50%Mindot to 100%
      3/4-tones75%50 to 100%75%50 to 100%
      Shadows90%75 to 100%90%75 to 100%

      The value in the box under each slider is a change percentage. The graph appears flat until you make an adjustment.  Move the appropriate slider to adjust the corresponding tonal range or enter the tint out change percentage in the box under the slider.

    3. You can click Device Curves to display the curve graph and see the result of you adjustments. 
    4. Click Apply.
  8. Define the target response for the spot ink.

     To define the spot ink target:
    1. Click the Conversion icon .
    2. Click the Spot Inks tab and select the desired target device condition from the Target dropdown list.
    3. In the Curves Method list, select a curve method:
      • Tonal Match: 

        Making the TVI of an output device condition match the TVI of a target device.

      • Manual Adjustments only: Generates a linear curve that can be manually adjusted later.


  • No labels