[alt-photo] Re: PVA for SIZE & GUM ?‏

[Peter Blackburn]

Hi Diana:

 

Yes, I did see the CCI approval which only added to my curiosity as to why the paper industry was omitting PVA from their sizing collection. But I think my contacts have answered that question adequately for me. None of them indicated a concern with stability or voiced any archival objections. They did question why we were using it as a size. It was a new one on them! 

 

Still, I have a few small swatches of papers coated with various dilutions of Gamblin PVA sitting in full sun, under fluorescent bulbs, and even in the freezer. I just want to know firsthand what might happen, especially under adverse conditions (as imperfect and incomplete as my testing methods may be), when a print leaves my hands into the hands of a buyer. I've done it with my pigments and paper, so this is par for the course with me.

 

I plan to work extensively with the PVA when I start my printing season starting in April. Using only the sun, I print from April through October.

 

Your information and input, Diana, has been very helpful and most appreciated.


Peter

 
> From: dhbloomfield at bellsouth.net
> To: alt-photo-process-list at lists.altphotolist.org
> Date: Fri, 5 Mar 2010 13:44:45 -0500
> Subject: [alt-photo] Re: PVA for SIZE & GUM ?‏
> 
> Hi Peter,
> 
> Thank you. I really appreciate that.
> 
> And, yes, I'm hoping that Jamee is being truthful. I did notice that 
> on the Gamblin site, under their PVA blurb (below), they thank the 
> "Canadian Conservation Institute," which, apparently, has helped 
> "painters and conservators identify the best PVA to use." I suspect 
> you might be able to go into the CCI site and retrieve some detailed 
> information about their PVA. I didn't bother to do that myself, 
> because since Gamblin mentions them specifically, I'm guessing 
> whatever they have to say about it is good. ?
> 
> Diana
> 
> 
> POLY VINYL ACETATE (PVA) SIZE
> Diluted with distilled water, PVA size is a contemporary size for 
> fabric support. Conservation scientists recommend painters use neutral 
> pH PVA size on linen and canvas instead of rabbit skin glue. PVA 
> provides a good size layer that seals the fabric but does not re- 
> absorb atmospheric moisture, swell and shrink like rabbit skin glue 
> does. There are hundreds of different formulae of PVA. We acknowledge 
> and appreciate the research of the Canadian Conservation Institute 
> that helps painters and conservators identify the best PVA to use. 
> Gamblin PVA Size is made from PVA that has a neutral pH and does not 
> yellow. It also retains its flexibility and does not emit harmful 
> volatiles.
> 
> >
> > Hello Diana:
> >
> >
> >
> > Thank you for bringing to my attention the communication you had 
> > with Gamblin. Jamee's comments are helpful and, hopefully, truthful. 
> > From the work I've seen on the web, I admire your vision and respect 
> > your insight.
> >
> > Peter J. Blackburn
> >
> 
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