John Hesselberth on sun 20 jul 08
On Jul 20, 2008, at 11:01 AM, Shula wrote:
> I'm deciding whether to use distilled water or water from the tap.
> The water here in Desert Hot Springs has received awards for great
> tasting municipal water, but the glaze is for pots, not drinking.
> As best I can tell, the water is from an aquifer. Not only do we
> have natural hot water (hence the name of Desert Hot Springs), but
> we also have cold water aquifers.
Hi Shula,
Distilled water is certainly the conservative approach. It really
depends on exactly what is in the tap water. If you have a lot of
sodium -- so-called soft water-- it could cause glaze to deflocculate
and hard pan. Municipal water systems that are primarily sourced from
rain are usually pretty soft. I have moderately hard water out of our
well and have no problems with it. I'd personally start with tap
water. If you have problems, switch for future batches.
Pete Pinnell ran a well publicized experiment where he had students
bring water from their homes all over the country and they used it to
mix the same glaze. The fired glazes were different in appearance. My
opinion is that this was primarily due to the way the water affected
the flocculation/deflocculation balance and, therefore, the way the
glaze applied itself to the pots.
Regards,
John
John Hesselberth
http://www.frogpondpottery.com
http://www.masteringglazes.com
Shula on sun 20 jul 08
I checked the archives and didn't see a discussion on this, although I thought I remembered discussing it some time. M question: clWhat do you use for your glaze and why - local water or distilled water?
I'm deciding whether to use distilled water or water from the tap. The water here in Desert Hot Springs has received awards for great tasting municipal water, but the glaze is for pots, not drinking. As best I can tell, the water is from an aquifer. Not only do we have natural hot water (hence the name of Desert Hot Springs), but we also have cold water aquifers.
Thanks for your help.
Shula
in Desert Hot Springs, California USA
looking forward to being home for 3 days in a row later this week so that I can fire my brand new kiln for the first time. YEAH!!!!! That firing will include my brand new kiln shelves - Advancers. It amazes me how little space a pile of Advancers shelves worth $1200 takes up.
Ric Swenson on mon 21 jul 08
Some towns that still have lead (Pb) water pipes use soda ash and other additives in the drinking water supply to keep the acid water adjusted to a more neutral pH balanced level and to keep it from leaching lead into households. Bennington's water supply is pretty naturally acid in nature, due to all the leaf decay in the aquafer. At Bennington Potters we had to test the water before making slip to make sure the amount of soda ash in the water supply didn't over deflocculate the slip. We had four 200 gallon tanks of various slips to balance. Usually it was not a problem, but I remember a few times the water was an issue. Not many people in Bennington, Vermont actually drink the tap water- by the way. That was in the 1990s....maybe they have "fixed" this problem by now? Regards, Ric "...then fiery expedition be my wing, ..." -Wm. Shakespeare, RICHARD III, Act IV Scene III Richard H. ("Ric") Swenson, Teacher, Office of International Cooperation and Exchange of Jingdezhen Ceramic Institute, TaoYang Road, Eastern Suburb, Jingdezhen City.JiangXi Province, P.R. of China. Postal code 333001. Mobile/cellular phone : 86 13767818872 < RicSwenson0823@hotmail.com> http://www.jci.jx.cn/http://www.ricswenson.com
> Date: Sun, 20 Jul 2008 08:01:00 -0700> From: purplelama@EARTHLINK.NET> Subject: water for glaze> To: CLAYART@LSV.CERAMICS.ORG> > I checked the archives and didn't see a discussion on this, although I thought I remembered discussing it some time. M question: clWhat do you use for your glaze and why - local water or distilled water?> > I'm deciding whether to use distilled water or water from the tap. The water here in Desert Hot Springs has received awards for great tasting municipal water, but the glaze is for pots, not drinking. As best I can tell, the water is from an aquifer. Not only do we have natural hot water (hence the name of Desert Hot Springs), but we also have cold water aquifers.> > Thanks for your help.> > Shula> in Desert Hot Springs, California USA> looking forward to being home for 3 days in a row later this week so that I can fire my brand new kiln for the first time. YEAH!!!!! That firing will include my brand new kiln shelves - Advancers. It amazes me how little space a pile of Advancers shelves worth $1200 takes up.
Get news, entertainment and everything you care about at Live.com. Check it out!
_________________________________________________________________
News, entertainment and everything you care about at Live.com. Get it now!
http://www.live.com/getstarted.aspx
| |
|
