Varios Español/Varios Español.iso/PMAKER65/archive.z/README.TXT

Text File | 1996-10-15 | 2KB | 25 lines

USING PROLOGUE.PS/EPILOGUE.PS WITH COLOR SEPARATIONS

When Distilling color PostScript files, sometimes separation color spaces (spot colors) can
be mapped to process colors, losing any defined custom colors. To remedy this, ensure that
the "Distill with prologue.ps/epilogue.ps" option is turned on in the Distiller Job Options,
Advanced dialog (or in UNIX, by adding the -includebookends on option to the command line).
Then, move the prologue.ps/epilogue.ps files from the Distillr:XTras:high_end folder into
the same folder as the Distiller application. For more information about using prologue.ps
and epilogue.ps files in general, see the Acrobat Distiller 3.0 Online Guide.

Here is a more technical description of why this occurs. PostScript files that conform to
the PostScript Level 1 conventions for color separations use an operator called
setcustomcolor, which gets defined by the application which receives/imports the file.
The default definition is to convert custom colors into their process color equivalents
using the setcmykcolor PostScript operator. This means that the separations information is
lost, which may be preferable if the file is not to be later separated.

If on the other hand, one wants separations, then a definition of setcustomcolor that uses
separation color spaces in PostScript is needed. The Distiller will then preserve that
information, and it can be printed from Exchange, either as PostScript Level 2 separation
color spaces, or as a PostScript Level 1 file conforming to the conventions for color
separations. To use this definition of setcustomcolor which retains the custom color
definitions, one must Distill files using the prologue.ps and epilogue.ps files described
above.