> I suspect you rather don't want to get a preview which necessarily
> matches the look in Acrobat reader, but rather a preview which matches
> the print (after printing the PDF file), is that correct?
>
> The problem with your goal is, that your PDF file is device dependent
> and not color managed. I suspect, it was created for being printed on a
> specific printer. However, without additional information about the
> color characteristic of this printer (e.g. an ICC profile or CSA) it
> won't be possible to create a preview with the right colors. Basically,
> a PDF or PostScript file could contain a CSA describing the color space,
> however, your PDF file does not. So both, ghostscript and acroread can
> only make some assumptions what the right colors might be, and they make
> different assumtions, and therefore they display different colors. But
> what makes you sure that the colors displayed by acroread really match
> the colors of the print exactly? (However, I also agree that the colors
> displayed by acroread look at least more reasonable than ghostscript,
> compared to the DeviceCMYK colors being interpreted for instance as
> U.S. Web Coated SWOP by applying a corresponding CSA).
>
> So I'm also wondering
>
> - On which printer is the PDF file supposed to be printed (i.e. do you
> have an
> ICC profile or CSA describing the color characteristics of this printer)?
I do not know what printer they have since we have all sorts of
printers doing CTP on their RIP. They will not use just one
printer. That's why my best shot is to approximate Acrobat Reader so that
no one can complain.
My colleague said to me if the preview is imported into PhotoShop
and changed into CMYK color space and change back into RGB, the look is
more closer to Acrobat Reader.
>
> - How was your PDF file generated?
> Could you alternatively generate a device independent PDF file,
> which uses CIE based color spaces instead of DeviceCMYK?
It is not possible at the moment since our PDF software won't
support CIE-Based color space.
--
With regards
Phillip Pan
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