March 2006 Alt-Photo-Process-L: RE: Gloy is NOT PVA

From: Gawain Weaver ^lt;gawain.weaver@gmail.com>
Date: 03/25/06-03:21:14 PM Z
Message-id: <001d01c65052$0ca63f80$0301000a@GawainX41>

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 15:21:28 2006