Photoshop CS6 spot channel not recognised by Postscript RIP

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  • Updated 6 years ago
Photoshop CS6 Spot channels in Tif-file no longer recognised by Postscript-RIP.
Up to CS5 no problem. Create the file in PS CS6 > not recognised by PS-RIP. Open the same file in PS CS5, re-save it and it works. Why?
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Bruno Kämpfer

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Posted 6 years ago

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Chris Cox

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Which RIP are you using? My guess is that they are reading an obsolete part of the metadata, and haven't updated their file format support in 10 years or more.
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Bruno Kämpfer

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RIP Software is Ergosoft PosterPrint version 12.1.
OK, i agree, the newest version of PP is 14.0.
So you suggest that upgrading to CS6 automatically means that you have to upgrade your RIP Soft- and Hardware for thousands of dollars?
It's always easy to think it's the RIP software's fault in the first place.
We print a lot of white ink. the white was usually recognised by the RIP-Software just by creating a spot channel in photoshop and putting everything that has to be white in it. I just don't see why this shouldn't work anymore when you write a Tif-file with the exact same settings?
Working under Mac OSX 10.6.8. Any other solution possible?
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Chris Cox

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No, but Photoshop changed the layout of some of the photoshop specific spot channel metadata several years ago. We maintained some backward compatibility for many years to give third parties a chance to fix their software - but we can't maintain it forever (too much extra code, redundant data, possibilities of conflicting data, etc.). Photoshop CS6 dropped the old compatibility code, because we figured that everyone had had enough time to update their file format support.

Yes, you are going to have to update your RIP software periodically if you want to keep up with changes in files.
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Bruno Kämpfer

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OK, the upgrade for the RIP-station is ordered and will be installed in about 2 weeks. I will report then, if it works. Thanks so far.