TAdams9848 on mon 12 may 97
I have a lot of glaze recipes that contain Barium Carbonate. How
concerned should I be about its toxicity relaease at cone 6? Is there a
substitute that is more
food safe? How do I test for Barium release?
CCPottery on thu 29 may 97
In the summer issue of Ceramics Monthly, there is a recipe for a Blue Rust
Glaze ^4-5 that uses Barium Carbonate. My glaze books tell me to
substitute a frit for safety but I can't seem to locate references for %
to use ...is there a formula? I am by no means a glaze genius- am willing
to test and test and test - but need a starting point. Please don't tell
me to go to the glaze data-base as I have no idea how to find it ...
unless someone is willing to share that info as well?
Christian Lim on fri 30 may 97
I think you can substitute Strontium Carbonate for 75% of the Barium amount
At 11:25 AM 5/29/97 EDT, you wrote:
>----------------------------Original message----------------------------
>In the summer issue of Ceramics Monthly, there is a recipe for a Blue Rust
>Glaze ^4-5 that uses Barium Carbonate. My glaze books tell me to
>substitute a frit for safety but I can't seem to locate references for %
>to use ...is there a formula? I am by no means a glaze genius- am willing
>to test and test and test - but need a starting point. Please don't tell
>me to go to the glaze data-base as I have no idea how to find it ...
>unless someone is willing to share that info as well?
>
>
\\|//
(o o)
~~~~~~~~~~~~oOOo~(_)~oOOo~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Chris
lim505@openix.com
"Out here I'm learning real skills that I can apply throughout the rest of
my life... Procrastinating and rationalizing" - Calvin
"If you do the job badly enough, sometimes you don't get asked to do it
again" - Calvin
"One of us needs to stick his head in a bucket of ice water" - Hobbes
Ron Roy on fri 30 may 97
>----------------------------Original message----------------------------
>In the summer issue of Ceramics Monthly, there is a recipe for a Blue Rust
>Glaze ^4-5 that uses Barium Carbonate. My glaze books tell me to
>substitute a frit for safety but I can't seem to locate references for %
>to use ...is there a formula? I am by no means a glaze genius- am willing
>to test and test and test - but need a starting point. Please don't tell
>me to go to the glaze data-base as I have no idea how to find it ...
>unless someone is willing to share that info as well?
Hi ?
Send me the recipe - much depends on how much Barium is there to start
with. I'll get you started in the right direction if it's possible.
Ron Roy
Toronto, Canada
Evenings, call 416 439 2621
Fax, 416 438 7849
Studio: 416-752-7862.
Email ronroy@astral.magic.ca
Home page http://digitalfire.com/education/ronroy.htm
Ray Carlton on fri 30 may 97
At 11:25 AM 29/05/97 EDT, you wrote:
>----------------------------Original message----------------------------
>In the summer issue of Ceramics Monthly, there is a recipe for a Blue Rust
>Glaze ^4-5 that uses Barium Carbonate. My glaze books tell me to
>substitute a frit for safety but I can't seem to locate references for %
>to use ...is there a formula? I am by no means a glaze genius- am willing
>to test and test and test - but need a starting point. Please don't tell
>me to go to the glaze data-base as I have no idea how to find it ...
>unless someone is willing to share that info as well?
>
>I havent't seen a reference to barium frits but barium is getting very
expensive to buy< I saw a posting here recently that suggested either
strontium carb or lithium carb is a good substitute. whoever posted that
could they clarify. i deleted the msg unfortunately
Ray Carlton McMahons Creek Victoria Australia
raycarlt@ozonline.com.au
Paul Lewing on mon 2 jun 97
I've been waiting for my issue of CM to arrive so I could recalculate
this glaze for you using a barium frit. I've converted a number of my
barium glazes to using Ferro frit 3289, and have been very happy with
the results.
Unfortunately, frit 3289 gives you the same number of molecular
equivalents of Boron as it does Barium, and there isn't any Boron in
this glaze to speak of. So no substitution would give the same
result. If someone out there knows of another barium frit, I'd be
really happy to know about it, and I'd be happy to recalculate this
glaze for you.
Paul Lewing, Seattle,
where today's rain didn't quite hold off long enough to get the lawn
mowed.
Tony Hansen on tue 3 jun 97
Paul Lewing wrote:
> If someone out there knows of another barium frit, I'd be
> really happy to know about it, and I'd be happy to recalculate this
> glaze for you.
Here are some with Barium amount indicated:
Moles Percent
BaO & 1.000& 53.100&A &FRIT 3247
BaO & 0.668& 27.400&A &FRIT 3289
BaO & 0.218& 17.900&A &FRIT 3831
BaO & 0.084& 6.200&A &FRIT 3300
BaO & 0.032& 1.500&A &FRIT 3466
BaO & 0.253& 15.000&A &FRIT 3471
BaO & 0.032& 1.500&A &FRIT 441
BaO & 0.065& 3.160&A &FRIT 595
BaO & 0.040& 2.600&A &FRIT Pb-704
BaO & 0.063& 4.100&A &FRIT Pb-1279
BaO & 0.254& 15.000&A &FRIT Pb-1R40
BaO & 1.000& 41.800&A &FRIT 385
BaO & 0.615& 21.700&A &FRIT 400
BaO & 0.200& 11.200&A &FRIT 494
BaO & 0.005& 0.290&A &FRIT 630
BaO & 0.073& 2.560&A &FRIT 3GF61A
BaO & 0.110& 8.100&A &FRIT P-64
BaO & 1.000& 41.900&A &FRIT P-318
BaO & 0.217& 17.800&A &FRIT P-404
BaO & 0.051& 4.100&A &FRIT P-586
BaO & 0.664& 27.400&A &FRIT P-626
BaO & 0.111& 10.600&A &FRIT P-688
BaO & 0.065& 5.500&A &FRIT P-827
BaO & 0.111& 6.700&A &FRIT P-1836
BaO & 0.042& 3.700&A &FRIT P-1F07
BaO & 0.051& 3.900&A &FRIT P-1V31
--
=================================================================
Tony Hansen, IMC thansen@mlc.awinc.com
Chris Trabka on sat 4 oct 97
Robert Wilt
Monona Rossol <75054.2542@CompuServe.COM>
Ric Swenson
Bill Walker
Hodaka Hasebe
jason elfert
Ron Roy
Evan Dresel
"Karl P. Platt"
Gavin Stairs
John Baymore
All of you responded to the barium thread(s) this summer. What is your
reaction/response to the article "Is Barium Carbonate Safe?" by Jeff
Zamek in the September 1997 edition of Ceramics Monthly?
Paul Herman on thu 17 feb 05
Maura,
I don't know what part of the country you are in, but I got barium
carbonate from Laguna Clay in Los Angeles. I ordered through my local
supplier, Nevada Dan (Reno NV).
It's not a cheap material, I seem to remember $.60 a pound or more.
I assume you are aware of barium's potential dangers. If not, you should
read up on it.
pretty glazes,
Paul Herman
Great Basin Pottery
Doyle, California US
http://www.greatbasinpottery.com/
----------
>From: Maura
>To: CLAYART@LSV.CERAMICS.ORG
>Subject: Barium Carbonate
>Date: Thu, Feb 17, 2005, 10:31 AM
>
> Can anyone help me to find an inexpensive, reliable souce for Barium
> Carbonate? I'd like to buy 25-50lbs. Thanks for your help Clayarters.
> Maura
Maura on thu 17 feb 05
Can anyone help me to find an inexpensive, reliable souce for Barium
Carbonate? I'd like to buy 25-50lbs. Thanks for your help Clayarters.
Maura
Lou Roess on thu 17 feb 05
On Feb 17, 2005, at 11:31 AM, Maura wrote:
> Can anyone help me to find an inexpensive, reliable souce for Barium
> Carbonate?
Maura, I would do some very thorough investigating before I bought or
used barium carbonate. The risks just aren't worth it to either you or
your customers. The archives will have tons of information.
Regards,
Lou in Colorado
Cindy in SD on fri 18 feb 05
Dear Maura,
Ask your nearest ceramic supplier. They can probably get barium for you,
even if they have to special order it. My supplier did not have barium
in their catalog, but they were happy to get it for me. I haven't gotten
around to trying it yet, though. Do be careful with it--as I'm sure
you've been told, it's pretty nasty. Not advisable for food items unless
you can have them tested at a lab. I don't know about the fumes, but be
sure your kiln is well vented, and remember to wear gloves and an
approved respirator.
Good luck with your experiments,
Cindy in SD
Paul Lewing on fri 18 feb 05
on 2/18/05 7:41 AM, Cindy in SD at cindys@RAPIDNET.COM wrote:
> I don't know about the fumes, but be
> sure your kiln is well vented,
It's always a good idea to have your kiln well ventilated, but I've never
seen any indication that barium will volatilize during firing. Manganese,
yes. Lead, yes. But barium, no. If you're going to avoid it, at least
avoid it for the right reasons.
Paul Lewing, Seattle
Judy Rohrbaugh on sat 19 feb 05
Hello, everyone,
I am a new member posting to test .
I purchased some barium carbonate a few years back from Laguna, still
haven't used it yet, am aware of the toxicity.
I think I was going to try for a glaze with a buttery surface, and I have
also heard it can create a nice blue, but I have never seen any barium blues.
I work in cone 5/6 ox, has anyone used barium carbonate with good results?
Just wondering as this topic was brought up and I never did do any tests with
it. I don't make many items to be used for food.
Thanks.
Judy Rohrbaugh
Fine Art Stoneware
Silver Lake, Ohio, USA
bill edwards on wed 6 jul 05
There's differing views of opinion here on this matter
as well as a whole mess of methods of doing pottery,
safe, and most have been covered over and over. The
archives are swollen with lots of this information in
store.
Here's a url.
http://physchem.ox.ac.uk/MSDS/BA/barium_carbonate.html
http://www.jtbaker.com/msds/englishhtml/B0348.htm
The above is just more info.
But we do have to take into consideration the what
if's and who is doing this and who our readers might
be at the time we make the choice to say something
which may or may not be safe. Dr. Ed certainly is
qualified, Vince is well versed but I disagree that we
can write it off that easily and allow one post to end
the discussion without first understanding why it is
toxic in certain amounts and how it enters the body
and when it enters the body based on body weight what
happens? How and where is the damage expected?
There's no alarmist views, no fears and we can't say
common sense applies or can we? I choose not to use
that because it implies that the larger audience knows
this information, which is not true!
Safety gear has always been a given. Ron and many
others, including myself have said over and over that
you can safely work with most any chemical but you
must know the properties and access which methods that
are safe in which to use them. Barium isn't a mean bad
bull-dog like some of the other materials out there
but we can't write it off as being "Safe" without a
proper explanation in full, I would expect better from
those who infer they know all this and also would like
to see their first hand information if they know more
on this subject. Lets get it right the first time and
lay this to rest.
My toxicologists would not allow me to use barium red
(a barium based pigment) in a specific set of colors
where spraying could possibly be done. That would mean
to mean that the route of exposure according to (2)
toxicologists from a 'exceptional' University setting
have a different point of view. Ingested? The
certification I had to have meant that the products
that included barium couldn't be ingested either
ruling out here in America that it was safe as a
colorant agent for children or those with health
issues. So no ASTM-D 4236 labeling would go on those
materials without serious over-hauling of the
chemistry and even then there were constant rules
being made on handling and safety. (I could have put
the materials on the market with a safe use notice but
not as a non-toxic product without severe alterations)
So please, don't be alarmed. You can use anything you
like just like an X-ray technician but they would have
more than common sense, they would be technically well
trained to handle radiation and most people don't have
that common enough training to understand those
dangers. We can't simply make it that easy!
Let this not take away from anyone who wishes to use
the material, but lets not undermine the efforts of
countless toxicologists and health professionals who
suggest particular handling habits as well as
establishing how much, how to use, when and where to
use and who may or may not use it given their
circumstances relating to their health. With great
respect I debate those who choose to enter into this
without properly backing up every word with additional
literature with a strong working knowledge of the
materials stated. Wear gloves and a mask, use good
cleaning habits and use whatever you like once you
explore the materials in-depth to a point of personal
satisfaction. Once you do that, you can rest better
knowing you have examined your desires and the
benefits out-weigh the negatives enough for you to
continue on using those products. Toxic scare is a
great word, I would adhere to it and learn from that
term as much as I could and then have all the fun you
can exploring your potential. Alarmist, nothing new to
learn there. It's always an open sign for those who
fear too much and often know too little. Everyone has
the capacity to figure out these things but I don't
expect our Professionals to give it an easy Ok,
without giving how they arrived to their conclusive
end.
If this sounds complicated. It means, don't breath the
dust, don't get on the skin and don't ingest. If you
can get past that, your on to the next level of making
pretty barium glazes. Now lets wait and see what
others have to say and get a full desciptive solution
once and for all if it's possible?
Its used in pesticide compounds. Rather effective in
the right ammount! Nothing alarming here, just FYI!
http://www.scorecard.org/chemical-profiles/summary.tcl?edf_substance_id=513%2d77%2d9
Bill Edwards
Edmar Studio and Gallery
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Edouard Bastarache on sun 11 apr 10
Check this out,
Russ Andavall, a potter, has been putting barium carbonate in his coffee =
=3D
on a regular basis.
He has not dropped dead yet !!!
http://www.youtube.com/watch?v=3D3DLl-N8mTHmaM
Enuff of the bariun scare
Gis,
Edouard Bastarache=3D20
Spertesperantisto=3D20
Sorel-Tracy
Quebec
http://edouardbastarache.blogspot.com/
http://www.flickr.com/photos/30058682@N00/
http://blogsalbertbastarache.blogspot.com/
http://cerampeintures.blogspot.com/
http://perso.wanadoo.fr/smart2000/index.htm
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