arts-pdf crackerjack 5.1 User Manual

 

 

 

•  Angle 

 

This list displays the screen angle value for each ink name. As with frequencies, 
unless edited (see below), the values are derived from the currently selected 

PPD. 

 

 
This button activates a dialog box where values for frequency, angle and transfer 
function can be edited for each color in the inks list. For spot colors, CMYK equivalents 

are display and the user may elect to convert this spot color to process on an individual 
basis. 

 

•  Frequency 

 

Initially, this box will display the value from the PPD for the currently selected ink 

name, Resolution, and Frequency as specified on the Color panel. This value may 
be changed, but ARTS PDF Crackerjack does nothing to ensure that the new 
value is valid for the target RIP. 

 

•  Angle 

 

Initially, this box will display the value from the PPD for the currently selected ink 

name, Resolution, and Frequency as specified on the Color panel. This value may 
be changed, but ARTS PDF Crackerjack does nothing to ensure that the new 

value is valid for the target RIP. 

 

•  Use custom transfer function 

 

When this box is checked, the user can click on “Transfer function...”. This will 

display a dialog where the user may enter values to specify a custom transfer 
curve for the selected ink color. This transfer function will be used for all data in 

the job that halftoned to this separation. 

 

•  Convert to process 

 

When this box is checked, color information for this spot color only will be 

converted to process color and appear on the appropriate CMYK plates. 

 

 
This button activates a dialog box where spot colors can be mapped to the selected spot 

color. The button will only be active when more than one spot color exists in the current 
PDF document. To use spot color mapping, select the color that you want other spot 

colors to be mapped TO, then click Map. 
 
Mapped spot colors can also be un-mapped. Once a color has been mapped it will appear 

in the inks list with a blue dot next to its name. Spot colors which have other spot colors 
mapped to them will appear normally in the inks list. 

  Page 34 of 79