Jim Bozeman on fri 29 mar 02
Hello, I would like to correspond with anyone who uses lead. I know that it is a toxic substance. I want to know how to handle using it. I've got one pound of it. Does it give off toxic vapors when it is fired in the kiln? I have a small gas kiln outside that I was thinking of firing it in to avoid vapors. Any info appreciated. Thanks, Jim
Send and receive Hotmail on your mobile device: Click Here
Tony Ferguson on fri 29 mar 02
Jim,
Yes it makes really nice glazes but ask yourself is it worth it to play =
with lead? I say, get rid of it properly. =20
Thank you!
Tony Ferguson
Stoneware, Porcelain, Raku
www.aquariusartgallery.com
Workshops available
218-727-6339
315 N. Lake Ave
Apt 312
Duluth, MN 55806
----- Original Message -----=20
From: Jim Bozeman=20
To: CLAYART@LSV.CERAMICS.ORG=20
Sent: Friday, March 29, 2002 4:41 PM
Subject: Anybody working with Lead Carbonate?
Hello, I would like to correspond with anyone who uses lead. I know =
that it is a toxic substance. I want to know how to handle using it. =
I've got one pound of it. Does it give off toxic vapors when it is fired =
in the kiln? I have a small gas kiln outside that I was thinking of =
firing it in to avoid vapors. Any info appreciated. Thanks, Jim
-------------------------------------------------------------------------=
-----
Send and receive Hotmail on your mobile device: Click Here
=
_________________________________________________________________________=
_____ 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.
Craig Clark on fri 29 mar 02
In the simplest, reasonably calm, terms that I'm able to muster. Don't =
use lead!
Craig Dunn Clark
619 East 11 1/2 st
Houston, Texas 77008
(713)861-2083
mudman@hal-pc.org
----- Original Message -----=20
From: Jim Bozeman=20
To: CLAYART@LSV.CERAMICS.ORG=20
Sent: Friday, March 29, 2002 6:41 PM
Subject: Anybody working with Lead Carbonate?
Hello, I would like to correspond with anyone who uses lead. I know =
that it is a toxic substance. I want to know how to handle using it. =
I've got one pound of it. Does it give off toxic vapors when it is fired =
in the kiln? I have a small gas kiln outside that I was thinking of =
firing it in to avoid vapors. Any info appreciated. Thanks, Jim
-------------------------------------------------------------------------=
-----
Send and receive Hotmail on your mobile device: Click Here
=
_________________________________________________________________________=
_____ 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.
Earl Brunner on sat 30 mar 02
Bill,
I would be suspect of any source that says "there are no lead fumes in the
atmosphere around kilns which are firing glazes which contain lead". Anyone that
would make such a statement in general terms, without factoring in the glaze
chemistry, the firing temperature and other conditions, has to be suspect.
There are many glazes in my kilns (fired at cones 06, 5-6 and 10) that show
evidence of vapor action, all that I have to do is look at the ring of color left
on the white kiln wash after a firing. So lets turn this around, could you provide
sources for your studies?
Bill Arnold wrote:
> Although I do not use lead bearing glazes I have investigated their safety.
> The studies that I have read state that there are no lead fumes in the
> atmosphere around kilns which are firing glazes which contain lead. If you
> have information contrary to this I would be interested in the source.
> Thanks, Bill
> ----- Original Message -----
> From: "Cindy Strnad"
> To:
> Sent: Saturday, March 30, 2002 1:33 PM
> Subject: Re: Anybody working with Lead Carbonate?
>
> > Dear Jim,
> >
> > Yes, lead does give off toxic fumes when fired. It will contaminate the
> bricks
> > of your kiln. If you weren't aware of this fact, it's possible that you're
> not
> > yet knowledgeable enough to work with lead. By the time you get there,
> you'll
> > most likely be ready to take that pound of lead to the local hazardous
> waste
> > site instead of feeling an obligation to use it up. Did your mom make you
> clean
> > your plate at dinner? I understand--mine did, too. We must not waste--yet
> > sometimes this attitude doesn't promote our best interests. No disrespect
> > intended to you. I am not knowledgeable enough to work safely with lead,
> either.
> > =====================================
> > Cindy Strnad
> > Earthen Vessels Pottery
> > RR 1, Box 51
> > Custer, SD 57730
> > USA
> > cindy@earthen-vessels-pottery.com
> > http://www.earthen-vessels-pottery.com
> > CM Critique discussion forum
> > http://www.earthen-vessels-pottery.com/toforum.html
> >
> >
> ____________________________________________________________________________
> __
> > 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.
> >
> > **************************************************************
> > Scanned by eScan Content-Security and Anti-Virus Software.
> > Visit http://www.mwti.net for more info on eScan and MailScan.
> > **************************************************************
> >
>
> **************************************************************
> Scanned by eScan Content-Security and Anti-Virus Software.
> Visit http://www.mwti.net for more info on eScan and MailScan.
> **************************************************************
>
> ______________________________________________________________________________
> 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.
--
Earl Brunner
http://coyote.accessnv.com/bruec
mailto:bruec@anv.net
Cindy Strnad on sat 30 mar 02
Dear Jim,
Yes, lead does give off toxic fumes when fired. It will contaminate the bricks
of your kiln. If you weren't aware of this fact, it's possible that you're not
yet knowledgeable enough to work with lead. By the time you get there, you'll
most likely be ready to take that pound of lead to the local hazardous waste
site instead of feeling an obligation to use it up. Did your mom make you clean
your plate at dinner? I understand--mine did, too. We must not waste--yet
sometimes this attitude doesn't promote our best interests. No disrespect
intended to you. I am not knowledgeable enough to work safely with lead, either.
=====================================
Cindy Strnad
Earthen Vessels Pottery
RR 1, Box 51
Custer, SD 57730
USA
cindy@earthen-vessels-pottery.com
http://www.earthen-vessels-pottery.com
CM Critique discussion forum
http://www.earthen-vessels-pottery.com/toforum.html
Bill Arnold on sat 30 mar 02
Although I do not use lead bearing glazes I have investigated their safety.
The studies that I have read state that there are no lead fumes in the
atmosphere around kilns which are firing glazes which contain lead. If you
have information contrary to this I would be interested in the source.
Thanks, Bill
----- Original Message -----
From: "Cindy Strnad"
To:
Sent: Saturday, March 30, 2002 1:33 PM
Subject: Re: Anybody working with Lead Carbonate?
> Dear Jim,
>
> Yes, lead does give off toxic fumes when fired. It will contaminate the
bricks
> of your kiln. If you weren't aware of this fact, it's possible that you're
not
> yet knowledgeable enough to work with lead. By the time you get there,
you'll
> most likely be ready to take that pound of lead to the local hazardous
waste
> site instead of feeling an obligation to use it up. Did your mom make you
clean
> your plate at dinner? I understand--mine did, too. We must not waste--yet
> sometimes this attitude doesn't promote our best interests. No disrespect
> intended to you. I am not knowledgeable enough to work safely with lead,
either.
> =====================================
> Cindy Strnad
> Earthen Vessels Pottery
> RR 1, Box 51
> Custer, SD 57730
> USA
> cindy@earthen-vessels-pottery.com
> http://www.earthen-vessels-pottery.com
> CM Critique discussion forum
> http://www.earthen-vessels-pottery.com/toforum.html
>
>
____________________________________________________________________________
__
> 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.
>
> **************************************************************
> Scanned by eScan Content-Security and Anti-Virus Software.
> Visit http://www.mwti.net for more info on eScan and MailScan.
> **************************************************************
>
**************************************************************
Scanned by eScan Content-Security and Anti-Virus Software.
Visit http://www.mwti.net for more info on eScan and MailScan.
**************************************************************
John Hesselberth on sun 31 mar 02
The subject of working with lead comes up every year or two on Clayart and,
yes, it can be used safely if you have sufficient knowledge AND have
appropriate equipment. Most potters, myself included, have neither. For
anyone considering working with it, however, I would ask that you read what
follows. It is a quote from a book written by William J Furnival in
September 1898 titled "Research on Leadless Glazes". Furnival was, among
other things, "Silver Medallist of the City and Guilds of London Institute
for Pottery and Porcelain--Honours Grade". The following is from the
Introduction of his book.
"All who have investigated the subject of lead-poisoning in the manufacture
of glazed pottery must admit that, for many persons employed in the glazing
and enameling departments, the use of carbonate and oxides of lead as
ingredients of the fluxes endangers health, and, in some instances, even
life. And not only so, for its evil effects are transmissible to those
unborn....
"Mr. Bertram Wilson, in the Hanley Labour Church report on lead-poisoning
(documents that).... Of 156 cases reported to them, twelve resulted in total
blindness, two of these being paralysed and insane, three of them died since
having been reported; of nine cases liable to go blind, three of them have
lost the sight of one eye; two other victims are paralysed and in bed and
nineteen paralysed and rendered unfit for work. Fitly does he remark:
'Heavy is the price that humanity pays for the use of raw lead in the
potting industry.'
"It has been claimed that fritting of the lead compounds with siliceous
materials, which, by the way, is simply going back to the the 'flint-glass'
of our grandfathers, renders glazes much less injurious; but it is not
denied that even in this state danger still exists..."
Furnival goes on to castigate those unwilling to share what they know about
making leadless glazes and he even names names and, in so many words, labels
them unfit to be counted as human beings. They used to speak or write
straight from their heart when there were fewer people looking to sue them
for slander of libel. Needless to say Furnival felt strongly about this
subject.
With this level of knowledge of the dangers of raw lead available for more
than 100 years, it is astonishing to me that anyone is still considering
working with it.
Regards,
John
web sites: http://www.masteringglazes.com and http://www.frogpondpottery.com
EMail: john@frogpondpottery.com
"Pots, like other forms of art, are human expressions: pleasure, pain or
indifference before them depends upon their natures, and their natures are
inevitably projections of the minds of their creators." Bernard Leach, A
Potter's Book.
Marcia Selsor on sun 31 mar 02
The Studio Potter magazine was originally published under the Daniel Clark
Foundation.
Daniel Clark was a potter in colonial America and deteriorated from use of lead in
his glazes.
Studio Potter published copies of his diary and business notes. His handwriting
deteriorated . Inventory lists included pruchase of lead for glazes.
Marcia Selsor
John Hesselberth wrote:
> The subject of working with lead comes up every year or two on Clayart and,
> yes, it can be used safely if you have sufficient knowledge AND have
> appropriate equipment. Most potters, myself included, have neither. For
> anyone considering working with it, however, I would ask that you read what
> follows. It is a quote from a book written by William J Furnival in
> September 1898 titled "Research on Leadless Glazes". Furnival was, among
> other things, "Silver Medallist of the City and Guilds of London Institute
> for Pottery and Porcelain--Honours Grade". The following is from the
> Introduction of his book.
>
BIG SNIP
> With this level of knowledge of the dangers of raw lead available for more
> than 100 years, it is astonishing to me that anyone is still considering
> working with it.
>
> Regards,
>
> John
>
> web sites: http://www.masteringglazes.com and http://www.frogpondpottery.com
> EMail: john@frogpondpottery.com
>
> "Pots, like other forms of art, are human expressions: pleasure, pain or
> indifference before them depends upon their natures, and their natures are
> inevitably projections of the minds of their creators." Bernard Leach, A
> Potter's Book.
>
> ______________________________________________________________________________
> 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.
| |
|
