This page last changed on Nov 18, 2008 by johannaf.

The default N-Factor is set at 2.0 and controls the slope of the curve.

  • Adjustments to the shape of the target density curves can be made by changing the "N-Factor" value for each color channel.
  • Raising the N-Factor value will shape the graph of the target densities with a more nearly linear series of targets.  This will tend to add saturation in the mid-tones.
  • By lowering the N-Factor value the elbow of the graph curve will sharpen.  This will de-saturate the mid-tone colors for the selected color channel. 

Make the desired changes and then click > Build to update the target densities. 

Print a test image and compare to a known proof to see if the adjustments are satisfactory.  Don't worry about the overall total ink at this point because ink limiting can be adjusted in the next step.  The primary reason we consider modifying the desired target curve is because some inks are non-linear, meaning that at 10% you may not be getting a true 10% work of ink.

The basic considerations for this test after tweaking the target densities is to verify that colors are correct and that the gray balance & gray neutrality are ok.  If they are still not correct go back to the display of the target densites graph by clicking on Build Linearization. Remember that this method may require a lot of repeated "Tweak and Test" steps.

Specific applications (such as Screen Printing and Press Printing) may require a more linear target and thus you would want to make adjustments to the N-Factor to compensate for these types of printing applications. Increasing the N-factor value gives you greater mid-tone saturation. Some addition vertical markets where this is applicable include:

  • Dye-sub
  • Backlit
  • Clear Film
  • Proofing
  • Screen-printing (You may choose to view the target densities in terms of "Dot Gain". this allows you to match the dot gain to a typical press)

See Desired Target Tab.

See Basic Density Curve - Media Model.

Document generated by Confluence on Nov 19, 2008 16:34