Transparency Blend Space in PDF Files

[cohort8133]

I was wondering if there was a way to find out what the transparency blend space is in PDF files using Acrobat 8 or PitStop 7.5. I know you can convert the Blend Space using Acrobat and PitStop will assign a Blend Space if there is none using its preflight feature, but I just want to be able to find out whether it is currently RGB, CMYK or None. Is this possible?

Thanks,
Aaron

[Lukas Engqvist]

In Acrobat 8 I think you need to make a preflight action to informa about blendspace. You can set the blend space in the colour converter, but seems you knew that.

In Acrobat 9:
If you look in the transparency flattener dialogue you can see the transparency blend space. I found that Corel PDF files default as RGB blendspace wich can give very strange results imo.

[cohort8133]

Thanks for the help but in Acrobat 8 using the preflight feature, as far as I can tell all I can check is to see if the Blend Space matches the Output Intent for PDF/x files. But since I'm not dealing with PDF/x files that won't work for me. It will also check for Blend Modes (ie, multiply, screen, overlay, ect...), but that is not the same thing.

[Lukas Engqvist]

Usually it is when there is a shortcoming that is important it comes in an upgrade. I did a preflight action in Acrobat 9 where I set the blendspave to device CMYK on all pages, so that it would not get strange results. (by this i mean all dark tones going to maximum ink making all shadow detail dissapear). I'd reccomend Acrobat 9, never got along with Acrobat 8.