Digital BW, The Print

Hi,
I'm currently preparing some framed images for local exhibition using my stock frames.

Some of the backing boards had got defaced as they've been used so much, so what I've done is to buy some quite thin, bright white cardboard to put over the old backing boards so that the backs are pristine.

I wondered whether such a practice could be unwise due to acid eventually migrating through the formacote or foamcore backing boards and into the photo paper. I'm hoping that the formacote or foamcore is thick enough for this not to happen - but don't have any experience to base this hope on. If so, I could perhaps put a layer of tin foil or polypropylene between the two. 

When businesses reopen after the xmas break it might just be easier to buy some large sheets of acid-free cardboard but I want to get these pictures on display before the end of the holiday season.

thanks,
Richard
--
Backroads Essay:
http://picasaweb.google.com/rsmallfield/TheBackroadsOfWarkworth
Greeting Cards available for purchase:
http://picasaweb.google.com/rsmallfield/GreetingCards
http://photos.smallfield.vze.com
http://smallfield.vze.com

   "Everything that can be invented has been invented." 
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   Patents, 1899