Paul Lewing on wed 13 nov 02
on 11/13/02 12:10 PM, Bill Edwards at wgedwards2001@YAHOO.COM wrote:
> There are multiple glycols out there that could be
> used but I can't see any reason in even looking beyond
> propylene glycol or maybe glycerin for formulating in
> a glaze.
Is there such a thing as diethylene glycol? Potterycraft used to put out an
overglaze product in a tube that was the best thing I've ever seen for
silkscreening. It seems to me that I read once the medium was diethylene
glycol, but I could be wrong. I've tried to make the same kind of thing
using ethylene glycol, and it just doesn't work as well as that old stuff.
Paul Lewing, Seattle
Bill Edwards on wed 13 nov 02
Hi,
Some people may not be aware of potential hazards such
as anti-freeze as others. Reducing the better known
harmfuls that can be used in pottery art through
exchanges made here I am sure has helped many people.
There are multiple glycols out there that could be
used but I can't see any reason in even looking beyond
propylene glycol or maybe glycerin for formulating in
a glaze. Propylene glycol can slow or retard any
freeze situations a glaze might under go where it is
cold. It is a humectant, lubricates, levels and has a
good history for safty.
Glycerin is easy to get. I would prefer Propylene
glycol for my own purpose. It has a couple additional
advantages and is used the world over by people making
non-toxic paints and cosmetics and foods. In other
words it has a long history for safety. (Regarding
P.G.)
There is little left to say other than keep your dogs
and cats and other small animals (Kids)away from
ethylene glycol. I read often where people are trying
to reduce air particulates and barium or lead in the
studios, why add another toxin in there? If its in a
glaze then its in an amount that could easily cause
damage to any animal that chose to drink from a
container with glaze in it.
William Edwards
=====
http://www.tallapoosariverpottery.com/
Bill Edwards
PO Box 267
Lafayette, AL, 36862
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Fredrick Paget on thu 14 nov 02
There is and there are a whole lot of higher polymers too. The lower ones
are liquid and as the polymerization goes higher they get more viscous and
finally solid. Called PEG or poly ethylene glycol.
Fred
>Is there such a thing as diethylene glycol? Potterycraft used to put out an
>overglaze product in a tube that was the best thing I've ever seen for
>silkscreening. It seems to me that I read once the medium was diethylene
>glycol, but I could be wrong. I've tried to make the same kind of thing
>using ethylene glycol, and it just doesn't work as well as that old stuff.
>Paul Lewing, Seattle
From Fred Paget, Marin County, California, USA
Edouard Bastarache on thu 14 nov 02
Inded, diethylene glycol exists,
CAS: 111-46-6
mf: C4H10O3
It is a clear, colourless, practically odourless, syrupy liquid
It is moderately toxic to humans by ingestion.
An eye and human skin irritant.
A questionable carcinogen, with experimental
carcinogenic, tumorigenic and teratogenic data.
Later,
Edouard Bastarache
Irreductible Quebecois
Indomitable Quebeker
Sorel-Tracy
Quebec
edouardb@sorel-tracy.qc.ca
http://sorel-tracy.qc.ca/~edouardb/
http://perso.wanadoo.fr/smart2000/index.htm
----- Original Message -----
From: Bob Santerre
To:
Sent: Thursday, November 14, 2002 5:38 PM
Subject: Re: Glycols
> Paul,
>
> I've never heard of diethylene glycol as a specific chemical product (it
> probably exists, I just haven't worked with it). There is however a
> product (actually products) called polyethylene glycol, PEG. PEG is a
> viscous medium of varying viscosity depending on the average chain
> length of the molecules in the preparation and the concentration of
> those molecules in the solution. For example PEG 2000 would contain
> molecules with an average molecular weight of 2000 and be more viscous
> than PEG 1000. Most any lab chemical distributor should carry PEGs.
> Mays Chemical in Indianapolis (317) 842-8722
> [http://www.mayschem.com/en/product.html] is one I'm familiar with.
>
> hope this helps, Bob
>
>
////////////////////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////////////////////
//////////////////////////////////////////////////
>
>
> Paul Lewing wrote:
>
> >on 11/13/02 12:10 PM, Bill Edwards at wgedwards2001@YAHOO.COM wrote:
> >
> >>There are multiple glycols out there that could be
> >>used but I can't see any reason in even looking beyond
> >>propylene glycol or maybe glycerin for formulating in
> >>a glaze.
> >>
> >
> >Is there such a thing as diethylene glycol? Potterycraft used to put out
an
> >overglaze product in a tube that was the best thing I've ever seen for
> >silkscreening. It seems to me that I read once the medium was diethylene
> >glycol, but I could be wrong. I've tried to make the same kind of thing
> >using ethylene glycol, and it just doesn't work as well as that old
stuff.
> >Paul Lewing, Seattle
> >
>
>___________________________________________________________________________
___
> >Send postings to clayart@lsv.ceramics.org
> >
> >You may look at the archives for the list or change your subscription
> >settings from http://www.ceramics.org/clayart/
> >
> >Moderator of the list is Mel Jacobson who may be reached at
melpots@pclink.com.
> >
> >
>
>
____________________________________________________________________________
__
> Send postings to clayart@lsv.ceramics.org
>
> You may look at the archives for the list or change your subscription
> settings from http://www.ceramics.org/clayart/
>
> Moderator of the list is Mel Jacobson who may be reached at
melpots@pclink.com.
Bob Santerre on thu 14 nov 02
Paul,
I've never heard of diethylene glycol as a specific chemical product (it
probably exists, I just haven't worked with it). There is however a
product (actually products) called polyethylene glycol, PEG. PEG is a
viscous medium of varying viscosity depending on the average chain
length of the molecules in the preparation and the concentration of
those molecules in the solution. For example PEG 2000 would contain
molecules with an average molecular weight of 2000 and be more viscous
than PEG 1000. Most any lab chemical distributor should carry PEGs.
Mays Chemical in Indianapolis (317) 842-8722
[http://www.mayschem.com/en/product.html] is one I'm familiar with.
hope this helps, Bob
//////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
Paul Lewing wrote:
>on 11/13/02 12:10 PM, Bill Edwards at wgedwards2001@YAHOO.COM wrote:
>
>>There are multiple glycols out there that could be
>>used but I can't see any reason in even looking beyond
>>propylene glycol or maybe glycerin for formulating in
>>a glaze.
>>
>
>Is there such a thing as diethylene glycol? Potterycraft used to put out an
>overglaze product in a tube that was the best thing I've ever seen for
>silkscreening. It seems to me that I read once the medium was diethylene
>glycol, but I could be wrong. I've tried to make the same kind of thing
>using ethylene glycol, and it just doesn't work as well as that old stuff.
>Paul Lewing, Seattle
>
>______________________________________________________________________________
>Send postings to clayart@lsv.ceramics.org
>
>You may look at the archives for the list or change your subscription
>settings from http://www.ceramics.org/clayart/
>
>Moderator of the list is Mel Jacobson who may be reached at melpots@pclink.com.
>
>
Bill Edwards on fri 15 nov 02
Hi,
Paul L. several people have replied to the entry on
diethylene glycol which may have answered you? Glycols
come in many forms from very liguid to very heavy or
viscous, propylene being one with better known safety
margins for the kind of work (pottery)I would use any
in. My purpose of making any statement at all was to
make sure those that may not have had an experience
with glycols and their known toxicity issues and
safety parameters were at least alerted to the
potential that some glycols really shouldn't play a
part in routine studio use if another product with
safer handling can be used in its place with better or
equal results.
Perhaps Eduoard (He is better qualified than I and he
makes sense)or one of the other chemists can add some
understanding on how it functions as a chemical in a
glaze.
Shippers - I shipped commercially for years with them
and never was able to get anything at all other than
excuses or them putting blame everywhere but on
themselves regarding damages or lost packages, of
course they would never really admit they are wrong!
Small business suffer when they buy new boxes, buy
packing materials and follow all the rules and then
have to suck it up and accept losses which include
shipping/insurance because someone there decides they
are right and you are wrong no matter what. The door
is closed unless you are willing to spend more than
they are, winning claims, and they know this isn't
going to happen all that often. They still profit
rather well like that. The isurance does one thing, it
provides more money for them if they reduce the
claims. Going to Vegas and playing the slots are a
better bet. (Those account reps slipped up) Class
action might get their attention? All insurers will
always say insurance is no good till you need it.
(Excuse me while I laugh on that one) Theres more
rules involved in getting money from insurance than
they are answers to. Who's is really protected? Just
read all the fine print!
William Edwards
=====
http://www.tallapoosariverpottery.com/
Bill Edwards
PO Box 267
Lafayette, AL, 36862
__________________________________________________
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