[gs-devel] Colour Separation output

[Ray Johnston]

Hi Mark,

Are you using the 'tiffsep' device ?

Please send a sample file (preferably small) that shows this
effect.

The CMYK produced will be controlled by the CRD (Color Rendering
dictionary) for colors that are "CIE" colors, or for ALL colors
if you specify -dUseCIEColor.

If you run a simple CMYK PS file, such as examples/tiger.eps you
_should_ only see K for the 'neutral' (i.e. gray or black) areas.

If you are running on Windows, you can use the the command line
option to view separations on the screen. For this, add the option:

    -dDisplayFormat=16#a0800

then you can use "right-click" in the title bar area and uncheck the
separations that you don't want to see. For example,

    gswin32c -dDisplayFormat=16#A0800 examples/tiger.eps

This also allows you to see the CMY as Black that you get when
you specify -dUseCIEColor using the default CRD.

For more information on CRD's, please consult Adobe's PostScript
Language Reference Manual:
   http://www.adobe.com/products/postscript/pdfs/PLRM.pdf

BTW, to distribute your C# wrapper, you may want to post this on
SourceForge ( http://sourceforge.net ).

Regards,
Ray
------------------------------------------------------------------------

Made4Print wrote:
> Hi,
>
> I have developed a GhostScript wrapper in C# which supports color
> separations to output all the CMYK and named spot colour tifs. I am using
> this to try and calculate the percentage coverage of each separation.
>
> If I create a PDF in Photoshop or Indesign which has a certain percentage of
> black on the page, when I process the PDF seprations I am expecting blank C,
> M, and Y. however it appears that the C, M and Y separations similar and
> relatively high values around 50% (by looking at the color in photoshop)
>
> Am I missing something here.
>
> If anyone wants the wrapper, I am happy to give this out to anyone who asks,
> please see email details at this address:  http://redmanscave.blogspot.com/
> http://redmanscave.blogspot.com/ 
>
> Any help will be appreciated.
>
> Thanks
>
> Mark Redman
>
>   

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