Re: Miracle size for gum

[francis schanberger <frangst@gmail.com>]

Being married to a painter, there is a half bottle of this stuff in her studio awaiting my experiments. If it works I will integrate it into the one color gum assignment scheduled for my alt class in early November. 

I just discovered Venetian Red and it's my new favorite color. I've gone from one extreme (low tinting pigment) to the other. 

One more vendor for Gamblin PVA:

http://www.dickblick.com/products/gamblin-pva-sizing/

-francis

On Sat, Oct 10, 2009 at 8:55 AM, John Brewer <john@johnbrewerphotography.com> wrote:

Is this the stuff Marek? I'm very interested to try this.
http://www.utrechtart.com/dsp_view_product.cfm?item=57707

John.

-----Original Message-----
From: phritz phantom [mailto:phritz-phantom@web.de]
Sent: 10 October 2009 13:36
To: alt-photo-process-l@usask.ca
Subject: Re: Miracle size for gum

hi marek,
does it really say "pv alcohol" on the bottle, not "pv acetate"?
i found the data sheet on the gamlin site yesterday and there it says:
"Product: Poly Vinyl Acetate (PVA) Glue
Chemical name: Ethylene/Vinyl Acetate Copolymer"

http://www.gamblincolors.com/msds/pdf/drying_oils/msds_PVA.pdf

what i've learnt on the substances so far (i think mostly from a post
from katharine thayer on apug), is that pv-alcohol is basically a simple
glue and not waterproof and pv-acetat is insoluble in water and the
better size.

regards
phritz



Marek Matusz schrieb:
> Loris,
> A note on the bottle says "post plasticezed neutral pH ply vinyl
> alcohol).
> perhaps one can mix a PVA solution from polyvinylalcohol that can be
> bought. I suspect that there are other additives in the Gamblin
> product, but they might not be all that relevant to the gum sizing.
> I also have to add it is so simple to just take some solution from the
> bottle, add water and brush it on paper, no additional chemicals, no mess.
> Marek
> > Date: Fri, 9 Oct 2009 23:48:02 +0300
> > From: mail@loris.medici.name
> > Subject: Re: Miracle size for gum
> > To: alt-photo-process-l@usask.ca
> >
> > Thanks for the report Marek. Unfortunately we don't have Gamblin
> > products here in Turkey. Do you have any idea about the formula? I can
> > find PVA but I'm not sure which one to buy and how much to use...
> >
> > Not directly related but just wanted to mention: For those who are
> > interested in "casein", the miracle sizing is cheap acrylic gesso 1+4
> > (or 1+5) with water.
> >
> > Regards,
> > Loris.
> >
> >
> > 2009/10/9 Marek Matusz <marekmatusz@hotmail.com>:
> > >
> > >  All,
> > > A few weeks ago there was some discussion on PVA sizing and I
> decided to try
> > > it for gum.
> > > ...
> > > The 1:2 turned out to be a miracle!
> > > ...
>
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-- 
francis schanberger

www.frangst.com