Re: Gloy is NOT PVA

I should perhaps add then that my reference (the late Arthur Johnson) was to
Polyvinyl Acetate.

----- Original Message -----
From: "Gawain Weaver" <gawain.weaver@gmail.com>
To: <alt-photo-process-l@sask.usask.ca>
Sent: Saturday, March 25, 2006 9:21 PM
Subject: RE: Gloy is NOT PVA

> My understanding is that Gloy contains polyvinyl alcohol, which is
> sometimes
> referred to as PVA but which I prefer to shorten to PVOH for clarity. PVOH
> is the hydrolyzed and often water-soluble derivative of polyvinyl acetate.
>
> Gawain Weaver
>
> -----Original Message-----
> From: davidhatton@totalise.co.uk [mailto:davidhatton@totalise.co.uk]
> Sent: Saturday, March 25, 2006 1:34 PM
> To: alt-photo-process-L@sask.usask.ca
> Subject: Gloy is NOT PVA
>
>
> Hi All,
>
> I know, it's an old subject but I would like a bit of information from
> someone in the chemistry field. But first, in my search for the elusive
> and
> almost extinct Gloy gum, I came across some interesting information. Two
> quotes both from different sources state that the gum (Gloy) does
> not contain any PVA.
>
> Does anyone out there now of a date when PVA was discovered/invented? This
> is directly relevant to the accuracy of this information.
>
> Can anyone help?
>
>
> David H
>
>
Received on Sat Mar 25 16:06:56 2006