Re: Stock Paint:Gum Solutions?
To Loris, re Mike Ware's PVA information:
Darn, I was hoping it would mean something to you, because it doesn't
mean much to me either. Maybe if I went back and went over my notes
from the time when I was studying research on PVA in dichromated
colloid processes, it would jog my memory. If so, I'll let you know.
Someone once pointed us to a great site that went over all the
different variables in PVA variability and explained what each of
them meant, but the last time I activated that bookmark, that
information was no longer there.
kt
On Oct 24, 2008, at 10:04 AM, Katharine Thayer wrote:
I found the information from Mike Ware on PVA for Loris:
"We found an 88% hydrolyzed PVA, with an RMM around 25 kd in 20% w/
v solution to offer the best all-around results--comparable to 14
Baume' gum."
"If you make any public use of this information, please cite it as
follows: Stephen Beckett, M. Phil. Thesis, University of Derby
(UK) November, 1993, (A private communication from Mike Ware)."
Katharine
On Oct 24, 2008, at 7:39 AM, Katharine Thayer wrote:
One of Mike Ware's students figured out what the best PVA is to
use for dichromate colloid process. I have the information in a
file somewhere and will look it up later day if I have time.
Katharine
On Oct 24, 2008, at 12:53 AM, Kees Brandenburg wrote:
On 24 okt 2008, at 09:31, Loris Medici wrote:
Of course, still, there's the problem of gum not being a defined
compound
(it can change depending on source and year of harvest).
Therefore I'm
interested in synthetic alternative such as PVA. I haven't find
a good
source of suitable PVA, plus, I'm not completely sure which kind
of PVA is
most suitable for our purposes. As soon as I figure these out
(source and
type), I'll leave gum aside and use PVA as the colloid. (My current
understanding is that something like 85% hydrolized, with a
molecular mass
around 10 - 12.000 should do well... Any thoughts?)
Hi Loris,
You can try Mowiol. You find some information at the Kremer
Pigmente site and on the site of the manufactrer Kuraray.
http://kremer-pigmente.de/shopint/index.php?cat=0207&product=67760
product info pdf: http://kremer-pigmente.de/shopint/
PublishedFiles/67700-67790e.pdf
http://www.kuraray-kse.com/start?open&&4
product info pdf: http://www.kuraray-kse.com/all/Portfolio_E/
$File/PVA_Standard_2008-08.pdf
kees
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