Detect and fix isolation knock-out transparency groups

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ckuhlmannHP
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Posts: 1
Joined: Tue Jan 09, 2018 9:19 pm

Detect and fix isolation knock-out transparency groups

Post by ckuhlmannHP » Wed May 23, 2018 1:19 am

Hello All,

Im looking for some pitstop help...

Back story:
We have a system that that processes 1000s of 2 page pdfs a day. We run these RGB pdfs through switch, and through a preflight process. during this preflight we convert everything to cmyk and save out to a folder for imposition.

The problem we are having is we are getting pdfs that contain "isolated Non-Knockout Transparency Groups". For some reason these do not convert to CMYK and when they go to our HP Dfe for ripping, they fail (renderbands).

I believe the fix will be that we have to flatten these files. But I only want to flatten if these groups are found.

Can anyone suggest how this might be done?

Thank you very much.

Padawan
Member
Posts: 87
Joined: Mon Jun 12, 2017 8:48 pm

Re: Detect and fix isolation knock-out transparency groups

Post by Padawan » Mon May 28, 2018 4:32 pm

To my knowledge you can report transparency groups, but not specific kind of transparency groups. This can be done by creating an Action List with these actions:

- Select transparent objects
(Change the options so it only reports transparency groups)
- Log selection
(Add a text which should be logged)

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