search  current discussion  categories  materials - misc 

unsafe glaze chemicals

updated mon 14 oct 02

 

Lisa-Marie Serafin on mon 7 oct 02


Hi All,
As I mentioned in a past posting, I worked at a studio for 3 years where =
glazes were mixed by the owner and deemed to be food safe. All except =
for one with barium. Now I've moved away and am on my own. I'm getting =
ready to mix my first batches of glazes. I've read many glaze recipes =
on the web and in books. I want everything I produce to be food safe. =
All of my ware is functional and you just never know what your customers =
are going to do with that piece when they get it home! Even if it was =
intended to be used as an umbrella stand, they just might think it would =
be a groovy soup terreen. Okay, so I get that lead, barium, uranium, =
vanadium are toxic to me when mixing them and not food safe either, but =
what about other glaze chemicals or combinations of chemicals? Is there =
an unsafe glaze chemical list somewhere on the Internet to which one can =
refer? As I am looking for recipes in older books I inhierited from the =
potter that sold me my kiln (were published in the 1970's), I wonder if =
the recipes are safe. =20
Thanks for all your help.

Lisa-Marie Serafin
Lac la Blanche, PQ

Lily Krakowski on tue 8 oct 02


There was a list of safer chemicals published by Clay Times a few years ago.
Regardless of that do get yourself one of the uptodate books on safe
materials/health/safety in the studio.



Lisa-Marie Serafin writes:

> Hi All,
> As I mentioned in a past posting, I worked at a studio for 3 years where glazes were mixed by the owner and deemed to be food safe. All except for one with barium. Now I've moved away and am on my own. I'm getting ready to mix my first batches of glazes. I've read many glaze recipes on the web and in books. I want everything I produce to be food safe. All of my ware is functional and you just never know what your customers are going to do with that piece when they get it home! Even if it was intended to be used as an umbrella stand, they just might think it would be a groovy soup terreen. Okay, so I get that lead, barium, uranium, vanadium are toxic to me when mixing them and not food safe either, but what about other glaze chemicals or combinations of chemicals? Is there an unsafe glaze chemical list somewhere on the Internet to which one can refer? As I am looking for recipes in older books I inhierited from the potter that sold me my kiln (were published in the 1970's), I wonder if the recipes are safe.
> Thanks for all your help.
>
> Lisa-Marie Serafin
> Lac la Blanche, PQ
>
> ______________________________________________________________________________
> 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.



Lili Krakowski
P.O. Box #1
Constableville, N.Y.
(315) 942-5916/ 397-2389

Be of good courage....

Lisa-Marie Serafin on wed 9 oct 02


Anyone have any titles for me to look at?
LM

----- Original Message -----
From: "Lily Krakowski"
To:
Sent: Tuesday, October 08, 2002 5:33 PM
Subject: Re: unsafe glaze chemicals


> There was a list of safer chemicals published by Clay Times a few years
ago.
> Regardless of that do get yourself one of the uptodate books on safe
> materials/health/safety in the studio.
>
>
>
> Lisa-Marie Serafin writes:
>
> > Hi All,
> > As I mentioned in a past posting, I worked at a studio for 3 years where
glazes were mixed by the owner and deemed to be food safe. All except for
one with barium. Now I've moved away and am on my own. I'm getting ready
to mix my first batches of glazes. I've read many glaze recipes on the web
and in books. I want everything I produce to be food safe. All of my ware
is functional and you just never know what your customers are going to do
with that piece when they get it home! Even if it was intended to be used
as an umbrella stand, they just might think it would be a groovy soup
terreen. Okay, so I get that lead, barium, uranium, vanadium are toxic to
me when mixing them and not food safe either, but what about other glaze
chemicals or combinations of chemicals? Is there an unsafe glaze chemical
list somewhere on the Internet to which one can refer? As I am looking for
recipes in older books I inhierited from the potter that sold me my kiln
(were published in the 1970's)
> , I wonder if the recipes are safe.
> > Thanks for all your help.
> >
> > Lisa-Marie Serafin
> > Lac la Blanche, PQ
> >
> >
____________________________________________________________________________
__
> > 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.
>
>
>
> Lili Krakowski
> P.O. Box #1
> Constableville, N.Y.
> (315) 942-5916/ 397-2389
>
> Be of good courage....
>
>
____________________________________________________________________________
__
> 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.
>

Carol Tripp on thu 10 oct 02


Hi Lisa-Marie,
I went through my hard copy files of Clayart to find a few emails that I
used when I was getting started making glazes. Go to the Archives and find
the following three emails:
Re: copper toxicity Tues, 2 Mar 1999 Gavin Stairs
Re: Glaze toxicity Fri, 28 Mar 1997 Ron Roy
Toxicity Chart Sun, 4 Jan 1998 Don Jung

Then you might want to read some/all of the emails in these threads to
expand your knowledge.
As for books, generally, the older the book, the less safety oriented it
will be. Educate yourself and then decide where you stand. Some people
don't take any precautions (life's too short whoopee and I want that
particular colour of glaze and I don't care what's in it), and others take
them all. It's up to you.
Best regards,
Carol
Dubai, UAE




"Success is going from failure to failure without loss of enthusiasm."
Churchill




_________________________________________________________________
Chat with friends online, try MSN Messenger: http://messenger.msn.com

Ron Roy on sun 13 oct 02


Hi Lisa-Marie,

I suggest Monona Rossol's book "The Artists Complete Health and Safety
Guide" - 2nd edition.

It covers Ceramics and most of the other disciplines as well - well
documented and written by an "independent" which means she is not working
for anyone and is free to include up to date information not yet included
in traditional data bases.

RR


>As I mentioned in a past posting, I worked at a studio for 3 years where
>glazes were mixed by the owner and deemed to be food safe. All except for
>one with barium. Now I've moved away and am on my own. I'm getting ready
>to mix my first batches of glazes. I've read many glaze recipes on the
>web and in books. I want everything I produce to be food safe. All of my
>ware is functional and you just never know what your customers are going
>to do with that piece when they get it home! Even if it was intended to
>be used as an umbrella stand, they just might think it would be a groovy
>soup terreen. Okay, so I get that lead, barium, uranium, vanadium are
>toxic to me when mixing them and not food safe either, but what about
>other glaze chemicals or combinations of chemicals? Is there an unsafe
>glaze chemical list somewhere on the Internet to which one can refer? As
>I am looking for recipes in older books I inhierited from the potter that
>sold me my kiln (were published in the 1970's), I wonder if the recipes
>are safe.
>Thanks for all your help.
>
>Lisa-Marie Serafin
>Lac la Blanche, PQ

Ron Roy
RR#4
15084 Little Lake Road
Brighton, Ontario
Canada
K0K 1H0
Phone: 613-475-9544
Fax: 613-475-3513