Edouard Bastarache on mon 28 oct 02
Acute intoxication by ingestion :
The lethal dose in man varies, according to barium compounds involved,
between 1 and 15 g. by ingestion. Acute intoxications are rare and generally
due to suicidal attempts with the chloride or the carbonate.
Some cases of collective food intoxications were reported, related to food
contamination, and to confusion between carbonate and barium sulphate at the
time of radiological examinations. Barium carbonate having been substituted
accidentally for potato flour during the preparation of sausages, 144 people
were poisoned in Israel in 1963. Two patients died.
Especially, one should not confuse barium carbonate with table sugar when
preparing coffee, first thing in the morning.
For those you want to learn more about barium and compounds go to:
http://perso.wanadoo.fr/smart2000/BaO.htm
or
http://digitalfire.com/education/toxicity/materialsafety.html
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
Edouard Bastarache Inc. on sun 10 jul 05
Hi Ron,
Do I understand from this that you do not believe there is any danger =
from
barium leached out of any glaze - to anyone - including a fetus?
"Yup, in all the texbooks, articles and databases searched, the only=20
information found is in my articles :
1-Barium and Compounds,
2-Pregnancy, Ceramics and Crystalware Making.
I just made a search in Le Repertoire Toxicologique de la CSST=20
(CSST's Toxicology Database),CSST being our own OSHA, and I have=20
more information in my articles.=20
In Quebec, as I have already told the list, we have a special program=20
to protect our pregnant/breast-feeding women. So, in that database=20
there is specific information regarding these problems and again I=20
checked for 3 chemicals, Barium Carbonate, Barium Chloride, and=20
Barium Oxide.Again, I supply more information, I am used with=20
using this database because I have been working on this program=20
for 22 years, and 10 hours a week."
The EPA sets their maximum contaminant level (MCL) for barium in =
drinking
water at 2 ppm because there is evidence that chronic exposure to =
amounts
above this can raise blood pressure in humans, probably due to kidney
damage.
"NSAIDs (Non Steroidal Anti-inflammatory Drugs), even those you may=20
buy without a prescription can cause a rise in blood pressure.
And they have not been withdrwan from the market.
The newer ones were withdrwan from the market for their deleterious=20
effect on the cardio-vascular system (ask Tom Sawyer) and they may=20
be brought back on the market under some special conditions except =
Bextra." =20
Would it not be prudent to at least try to make barium containing
liner glazes somewhat stable?
"I searched again the same database for Barium Carbonate, Barium=20
Chloride and Barium Oxide and they are not considered chronic toxicants.
Maybe we could explain this by their half-life and by comparing it=20
with Lead's and Cadmium's :
The =BD-life is too short to have a behabior like Lead and Cadmium.=20
The biological half-life of barium compounds vary between 2 and 20 =
hours.
Lead's half-life :
1-In the adult, blood lead half-life is approximately 1 month.
2-The half-life in soft tissues (such as central and peripheral nervous =
systems, the liver, kidneys and muscles) is approximately 40 to 60 days.
3-The half-life in the bone compartment is approximately 20 to 30 years
4-The whole body lead half-life depends on the body burden, which itself =
is related to the duration of exposure of workers.=20
Cadmium's half-life :=20
A large part of absorbed cadmium is retained in the body and its =
excretion=20
is very slow, 10 to 33 years. The very long biological half-life of =
cadmium=20
allows to assess excessive impregnation several years after cessation of =
exposure.
Half-life is defined as follows : The period over which the =
concentration=20
of a specified chemical or drug takes to fall to half its original =
concentration=20
in the specified fluid or blood. =20
Now you see why these last 2 are regulated."
Later,
RR
>Barium Carbonate,
>
>from my text "Pregnancy, Ceramics and Crystalware Making"
>Effects on development :
>
>In animals :
>
>No harmful anatomical effect was observed in the off-springs of rats =
and
>mice receiving up to 4000 ppm of barium chloride dihydrate in water, =
even if
>the weight at birth of the young ones was reduced.
>
>Effects on reproduction :
>
>In animals :
>
>In rats and mice receiving up to 4000 ppm barium chloride dihydrate in
>water, the indices of reproduction were not altered.
>
>Effects on breast milk :
>
>There is no data concerning its excretion or detection in milk.
>Now my credentials concerning my knowledge of barium compounds :
>
>"Bastarache E. Barium and compounds/toxicology (CASRN 7440-39-3).
>
>Integrated risk information system, IRIS toxicological review,
>
>US Environmental protection agency (EPA)."
>Later,
>Edouard Bastarache
Ron Roy
RR#4
15084 Little Lake Road
Brighton, Ontario
Canada
K0K 1H0
Phone: 613-475-9544
Fax: 613-475-3513
_________________________________________________________________________=
_____
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.
Back to: Top of message | Previous page | Main CLAYART page
Ron Roy on mon 18 jul 05
Hi Edouard,
I found lots saying there is a problem - I don't understand how you could
have missed this?
Other Leachable Metals
Other metals can leach into food and drink. Cadmium is the single metal
besides lead presently regulated in the United States and Canada. However,
other possible toxic metals in glazes can leach. Barium has been seen in
some tests to leach in hazardous amounts from certain glaze formulations.
If a barium glaze, or other glaze, changes color from contact with food, do
not use the vessel for food. Try and use only glazes with calcium,
magnesium, potassium, and sodium fluxes and minimize the amounts of toxic
metal colorants. Routine testing for other metal leaching should be done.
More research needs to be done in this area.
http://web.princeton.edu/sites/ehs/artsafety/sec12.htm
http://ptcl.chem.ox.ac.uk/MSDS/glossary/un_hazard_codes.html
http://msds.ehs.cornell.edu/msdssrch.asp
RR
>Hi Ron,
>
>Do I understand from this that you do not believe there is any danger from
>barium leached out of any glaze - to anyone - including a fetus?
>
>"Yup, in all the texbooks, articles and databases searched, the only
>information found is in my articles :
>1-Barium and Compounds,
>2-Pregnancy, Ceramics and Crystalware Making.
>I just made a search in Le Repertoire Toxicologique de la CSST
>(CSST's Toxicology Database),CSST being our own OSHA, and I have
>more information in my articles.
Ron Roy
RR#4
15084 Little Lake Road
Brighton, Ontario
Canada
K0K 1H0
Phone: 613-475-9544
Fax: 613-475-3513
Edouard Bastarache Inc. on mon 18 jul 05
Ron,
if you wish to start a crusade to have barium regulated,
by all means do so, but do not count me in.
Later,
"Ils sont fous ces quebecois"
"They are insane these quebekers"
"Están locos estos quebequeses"
Edouard Bastarache
Irreductible Quebecois
Indomitable Quebeker
Sorel-Tracy
Quebec
edouardb@sorel-tracy.qc.ca
www.sorel-tracy.qc.ca/~edouardb/Welcome.html
http://www.ceramique.blogspot.com/
http://www.flickr.com/photos/30058682@N00/
http://perso.wanadoo.fr/smart2000/index.htm
http://www.digitalfire.com/education/toxicity/
Ron Roy on thu 21 jul 05
Dear Edouard,
On the contrary - I think it is important to understand the material and
it's appropriate use - so it will not be used in such a way that it will
need to be further regulated.
I also see it is already regulated in some countries and there are
established water limits here.
I also see the bags must have a poison label.
I think talking about it is the only way it will not be further regulated.
RR
>Ron,
>
>if you wish to start a crusade to have barium regulated,
>by all means do so, but do not count me in.
>
>
>Later,
>Edouard Bastarache
Ron Roy
RR#4
15084 Little Lake Road
Brighton, Ontario
Canada
K0K 1H0
Phone: 613-475-9544
Fax: 613-475-3513
Chuck Wagoner on thu 21 jul 05
All my teachers were extremely careful with the Barium Carbonate. It was
high on Dick Hay's (Indiana State) list of toxic materials. It was used
in smaller percentages and was not intended for a liner glaze in a
functional pot. I buy it from a brick making company. They use it to
reduce scumming on the bricks.
What not just be really safe and careful while still using the glaze
anywhere but on the inside of functional ware?
Super hot and humid where nothing is drying worth a darn,
The Billie Creek Potter "Bald Headed Potter of America"
50 miles west of Indy on US36 in the county of Covered Bridges.
>
> Dear Edouard,
>
> On the contrary - I think it is important to understand the material
and
> it's appropriate use - so it will not be used in such a way that it
will
> need to be further regulated.
>
> I also see it is already regulated in some countries and there are
> established water limits here.
>
> I also see the bags must have a poison label.
>
> I think talking about it is the only way it will not be further
regulated.
>
> RR
Paul Lewing on wed 8 feb 06
on 2/8/06 5:46 PM, Jacqueline Miller at jackieamiller@GMAIL.COM wrote:
> The community college where I pot has rid itself of
> barium which is probably quite wise. However, there are a number of glazes
> that I really would like to make that contain barium. Can anyone suggest a
> substitution?
Jackie, the usual substitution is 70% as much strontium carbonate as you had
barium carbonate. This will usually result in a similar glaze surface, but
the colors will sometimes be quite different. If one of you barium glazes
is that bright electric blue with copper, don't expect to get that with
strontium. But things like pale green mattes will often be virtually
identical.
Paul Lewing, Seattle
Jacqueline Miller on wed 8 feb 06
Barium substitute: The community college where I pot has rid itself of
barium which is probably quite wise. However, there are a number of glazes
that I really would like to make that contain barium. Can anyone suggest a
substitution? I am very new to glaze making. Jackie
Miller
Daniel Semler on wed 8 feb 06
Hi Jackie,
Barium carb is a funny one. Subbing it successfully will depend very much on
the glaze and how much is used in it. If you have a recipe we can look at it
will help. If want an offline opinion, while I'm probably not the best person
to look at it, feel free to send it to me offlist, though onlist would likely
garner more comment that would be of use.
Thanx
D
Tom Buck on wed 8 feb 06
JM:
The subbing of Barium is covered in the Clayart Archives, being
discussed many times.
Barium is a Group 2A metal (same "family" as Calcium and Magnesium
and Strontium). So, if the Barium compound called for is low (say below 8%
by weight), then simply use a Calcium compound instead. If the amount is
above 8% switch to Strontium material (usually all are the carbonate form
of the element-- whiting (calcium carbonate) or Strontium carbonate.
the subbing has to be done on a molar basis ... ie, the same
number of moles (one mole of calcium carbonate is 100 weight units; one
mole of Stromium carbonate is 147.6; and one mole of Barium carbonate is
197.3 weight units).
Tom Buck
)
-- primary address. "alias" or secondary address.
tel: 905-389-2339 (westend Lake Ontario, province of Ontario, Canada).
mailing address: 373 East 43rd Street, Hamilton ON L8T 3E1 Canada
Ivor and Olive Lewis on thu 9 feb 06
Dear Friends,
I suppose the real questions should be, "Why was Barium Carbonate =
incorporated into this Glaze recipe in the first place. What unique =
properties does it bring to the quality of the glaze. Is it an Optical =
effect? Is it a Visual effect? Is it a Textural Effect?"
The only truly stunning effect I can recall being attributable to the =
inclusion of Barium Carbonate is the development of an Opaque Mat =
Turquoise Blue. There may be others but I have not heard about them.
So, why did these recipes incorporate Barium Carbonate?
Substitutes. My choice would be Magnesia, either as the Carbonate or as =
Talc. Why pay extra for Strontium Carbonate? Lime Magnesia surfaces are =
subtly seductive
Best regards,
Ivor Lewis.
Redhill,
South Australia.
Ron Roy on thu 9 feb 06
Hi Sandy - send the recipes to me at:
ronroy@ca.inter.net
Be sure to let me know if there are any problems with them - I may be able
to fix them as I take the Barium out.
Two colours will not work the same with strontium by the wat - from cobalt
and copper - but I think the iron colours are better.
This is not very complicated when you use calculation software by the way.
One of the advantages - when you sub in strontium carbonate - you need less
so you you lower expansion and it helps when fixing crazing.
Just let me know if you are willing to use strontium - it is more expensive
than barium - but you need less.
Many barium glazes are OK with calcium instead as well - as Daniel stated.
Maybe Daniel would be willing to do some for you as well - it would be
interesting to have two of us do them and you could compare the results.
RR
>Barium substitute: The community college where I pot has rid itself of
>barium which is probably quite wise. However, there are a number of glazes
>that I really would like to make that contain barium. Can anyone suggest a
>substitution? I am very new to glaze making. Jackie
>Miller
Ron Roy
RR#4
15084 Little Lake Road
Brighton, Ontario
Canada
K0K 1H0
Phone: 613-475-9544
Fax: 613-475-3513
Heather Farrell on thu 9 feb 06
Usually I find that barium is included in a glaze for the unique colour responses that it gives. *bright* greens and turquoises. Strontium is the closest replacement as far as colour response goes -( at least that I've tried)... I do know of one potter who has a glossy barium green liner that she has had tested at a lab and it does not leech, so it is possible to use as a liner if it is a stable non-leaching glaze. I'd have it tested for sure, though.
//Heather
Ivor and Olive Lewis wrote:
Dear Friends,
I suppose the real questions should be, "Why was Barium Carbonate incorporated into this Glaze recipe in the first place. What unique properties does it bring to the quality of the glaze. Is it an Optical effect? Is it a Visual effect? Is it a Textural Effect?"
The only truly stunning effect I can recall being attributable to the inclusion of Barium Carbonate is the development of an Opaque Mat Turquoise Blue. There may be others but I have not heard about them.
So, why did these recipes incorporate Barium Carbonate?
Substitutes. My choice would be Magnesia, either as the Carbonate or as Talc. Why pay extra for Strontium Carbonate? Lime Magnesia surfaces are subtly seductive
Best regards,
Ivor Lewis.
Redhill,
South Australia.
______________________________________________________________________________
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Daniel Semler on fri 10 feb 06
Hi Ron, Sandy,
Sure, I'd love to take a look at them.
BTW I think it was actually Tom Buck who suggested calcium. I'm very
interested in the relative success of the various subs available. Colour
response is the tricky one seems to be the consensus. Iron seems to work
better, as Ron said, at least in the Woo Yellow sub I tried a while back.
Thanx
D
Ivor and Olive Lewis on sat 11 feb 06
Dear Heather Farrell,
Thank you for your response to my comments.
Knowing that Barium Carbonate is supposed to give good mat glazes I did =
tests with up to 30% BaCO3. Every sample gave me a transparent high =
gloss result. None of these have been tested for leaching nor have I =
taken that work further.
But your example shows that what is published in the literature should =
not be taken as the "Last Word"
Best regards,
Ivor Lewis.
Redhill,
South Australia.
Robert Fox on thu 14 dec 06
Hi everyone. I had a question about barium. I know it should be used on
non functional pottery, but before it is fired, is it only harmful if you
breath it in or ingest it, or should you also not touch it without gloves?
Thank You Very Much
William & Susan Schran User on thu 14 dec 06
On 12/14/06 5:55 PM, "Robert Fox" wrote:
> I had a question about barium. I know it should be used on
> non functional pottery, but before it is fired, is it only harmful if you
> breath it in or ingest it, or should you also not touch it without gloves?
Here's the MSDS for barium carbonate:
http://www.jtbaker.com/msds/englishhtml/B0348.htm
Anytime you have questions about a material, do a web search using the
material and "msds" as the key words.
--
William "Bill" Schran
wschran@cox.net
wschran@nvcc.edu
http://www.creativecreekartisans.com
Bill Merrill on tue 11 dec 07
Many glazes need barium in them to produce the color range you may want.
I don't use barium glazes on the interior of bowls meant for serving but
on the outside of different forms. If one totally discounts barium
carbonate in our glazes, there will be beautiful glazes that cannot be
used. I for one am very careful with all materials and glazes. I have
made pots for nearly 50 years and have used barium carbonate. I have
been checked for metals etc. and am a normal level.=20
The same thing goes for manganese. We all make choices and if Barium is
something that you feel is potentially hazardous, then simply don't use
it. There are thousands of great glazes to choose from, so get your
glaze theory hats on and go to work searching out a palette that suits
you. I use a glaze named LP matt. The glaze has barium in it and is a
beautiful robin's egg blue when everything goes right. An Alfred
student with the initials LP did tests while in a glaze chemistry class
many years ago. Keep making pots the best ones are still in you!
=20
Bill=20
Edouard Bastarache Inc. on tue 11 dec 07
"Foodstuffs provide also barium and the daily=20
human intake has been estimated to be in=20
the order of 1 mg".=20
What do we do next?
Stop eating,
or
Stop drinking water.
Gis la revido,
Edouard Bastarache
Spertesperantisto
Sorel-Tracy
Quebec
http://www.sorel-tracy.qc.ca/~edouardb/Welcome.html
http://perso.orange.fr/smart2000/livres.htm
http://www.pshcanada.com/Toxicology.htm
http://www.ceramique.com/librairie/
http://www.flickr.com/photos/30058682@N00/
http://myblogsmesblogs.blogspot.com/
Mark Issenberg on wed 12 dec 07
This has been very interesting. I really like Barium Blue glazes.. I dont
use any but maybe I will in the future..
I was doing some Barium Glazes when I was fire cone 6 , I really liked them
also but was afraid of using them on functional ware.. I make Ikabana
containers and had made some using the Barium glazes when a customer told me she
loved using it for serving shrimp with dip..
Can any one give me the info with a phone number for the place that tests
the glaze
I have hundreds of pounds of limestone which I was hoping I could use for
whiting but in my glazes it makes the glaze too dry
Happy Holidays yall
Mark
Lookoutmountainpottery.com
**************************************See AOL's top rated recipes
(http://food.aol.com/top-rated-recipes?NCID=aoltop00030000000004)
Dan Semler on wed 12 dec 07
Hi Mark,
Check John Hesselberth's website here
It lists two labs that
will do it.
Thx
D
June Perry on wed 12 dec 07
Mark,
Your tale of the barium glazed ikebana container being used for food is one
of the reasons we should never use these unsafe glazes as liner glazes.
We may sell what we think is a lovely barium copper blue vase and the
purchaser may decide that it's a perfect piece for serving bloody mary's or mimosas
at her Sunday Brunch party!
I see a lot of potters selling basket forms, vases etc. with high copper
and/or barium content glazes. It is this kind of irresponsibility or ignorance
that can compromise all hand made pottery.
Regards,
June
_http://www.shambhalapottery.com_ (http://www.shambhalapottery.com/)
_http://shambhalapottery.blogspot.com_
(http://shambhalapottery.blogspot.com/)
_http://groups.yahoo.com/group/sodasaltfiring_
(http://groups.yahoo.com/group/sodasaltfiring)
**************************************See AOL's top rated recipes
(http://food.aol.com/top-rated-recipes?NCID=aoltop00030000000004)
Ron Roy on wed 12 dec 07
Not sure of your logic here Ed - if we are already getting extra by eating
and drinking - should we be adding more?
RR
>"Foodstuffs provide also barium and the daily
>
>human intake has been estimated to be in
>
>the order of 1 mg".
>
>
>
>What do we do next?
>
>Stop eating,
>
>or
>
>Stop drinking water.
>Edouard Bastarache
Ron Roy
RR#4
15084 Little Lake Road
Brighton, Ontario
Canada
K0K 1H0
Edouard Bastarache Inc. on wed 12 dec 07
Ron,
It shows the drinking standard is not applicable
to ceramic utilitaian wares.
Gis la revido,
Edouard Bastarache
Spertesperantisto
Sorel-Tracy
Quebec
http://www.sorel-tracy.qc.ca/~edouardb/Welcome.html
http://perso.orange.fr/smart2000/livres.htm
http://www.pshcanada.com/Toxicology.htm
http://www.ceramique.com/librairie/
http://www.flickr.com/photos/30058682@N00/
http://myblogsmesblogs.blogspot.com/
----- Original Message -----
From: "Ron Roy"
To:
Sent: Wednesday, December 12, 2007 6:48 PM
Subject: Re: Barium
> Not sure of your logic here Ed - if we are
> already getting extra by eating
> and drinking - should we be adding more?
>
> RR
>
>>"Foodstuffs provide also barium and the daily
>>
>>human intake has been estimated to be in
>>
>>the order of 1 mg".
>>
>>
>>
>>What do we do next?
>>
>>Stop eating,
>>
>>or
>>
>>Stop drinking water.
>
>>Edouard Bastarache
>
> Ron Roy
> RR#4
> 15084 Little Lake Road
> Brighton, Ontario
> Canada
> K0K 1H0
>
> ______________________________________________________________________________
> Clayart members may send postings to:
> clayart@lsv.ceramics.org
>
> You may look at the archives for the list, post
> messages, or change your
> subscription settings here:
> http://www.acers.org/cic/clayart/
>
> Moderator of the list is Mel Jacobson who may be
> reached at melpots2@visi.com
>
>
>
> --
> No virus found in this incoming message.
> Checked by AVG Free Edition.
> Version: 7.5.503 / Virus Database:
> 269.17.1/1182 - Release Date: 2007-12-12 11:29
>
>
Ivor and Olive Lewis on thu 13 dec 07
Dear Mark Issenberg,
Ground limestone should substitute for Whiting on a one to one basis in =
any glaze formulation. If you are getting dry mat results there are =
possible reasons.
a. The maturity temperature is not being achieved so the calcium oxide =
formed during heating is not being taken into solution.
b. Calcium oxide is taken into solution but because of an excess amount =
over that needed to give a clear glaze, crystalline Wollastonite is =
precipitating as the glaze cools.
c. Your Limestone is contaminated, perhaps with silica sand.
Best regards,
Ivor Lewis.
Redhill,
South Australia.
=20
John Hesselberth on thu 13 dec 07
On Dec 13, 2007, at 12:21 AM, Ivor and Olive Lewis wrote:
> Ground limestone should substitute for Whiting on a one to one
> basis in any glaze formulation.
In the U.S., products sold in garden centers and labeled as limestone
are often dolomite or have a high percentage of dolomite. So they may
not substitute 1 for 1.
Regards,
John
John Hesselberth
www.frogpondpottery.com
"Man is a tool-using animal....without tools he is nothing, with
tools he is all" .... Thomas Carlyle
Ron Roy on sat 15 dec 07
It does in Austria - RR
>It shows the drinking standard is not applicable
>to ceramic utilitaian wares.
>
>
>Gis la revido,
Ron Roy
RR#4
15084 Little Lake Road
Brighton, Ontario
Canada
K0K 1H0
Edouard Bastarache Inc. on sat 15 dec 07
Ron,
like I have told you many times :
"While in a foreign country,
do like the citizens of that country."
Maybe, you and your followers should stage
a huge "Ban The Barium Demonstration" in
front of FDA's offices in Washington; like
we staged "Ban The Bomb Demonstrations"
in fifties, the results were not so spectacular.
And, check what will happen.
Gis la revido,
(A la revoyure)
Edouard Bastarache
Spertesperantisto
Sorel-Tracy
Quebec
http://www.sorel-tracy.qc.ca/~edouardb/Welcome.html
http://perso.orange.fr/smart2000/livres.htm
http://www.pshcanada.com/Toxicology.htm
http://www.ceramique.com/librairie/
http://www.flickr.com/photos/30058682@N00/
http://myblogsmesblogs.blogspot.com/
----- Original Message -----
From: "Ron Roy"
To:
Sent: Saturday, December 15, 2007 8:40 PM
Subject: Re: Barium
> It does in Austria - RR
>
>
>>It shows the drinking standard is not applicable
>>to ceramic utilitaian wares.
>>
>>
>>Gis la revido,
>
> Ron Roy
> RR#4
> 15084 Little Lake Road
> Brighton, Ontario
> Canada
> K0K 1H0
>
> ______________________________________________________________________________
> Clayart members may send postings to:
> clayart@lsv.ceramics.org
>
> You may look at the archives for the list, post
> messages, or change your
> subscription settings here:
> http://www.acers.org/cic/clayart/
>
> Moderator of the list is Mel Jacobson who may be
> reached at melpots2@visi.com
>
>
>
> --
> No virus found in this incoming message.
> Checked by AVG Free Edition.
> Version: 7.5.503 / Virus Database:
> 269.17.2/1185 - Release Date: 2007-12-15 12:00
>
>
Ron Roy on wed 19 dec 07
Hi Ed,
I'll decline the invitation to do what I think is wrong - every time.
I have no interest in banning anything - I would like to encourage
understanding and responsible behavior however.
As for leaders and following - I think that is a false understanding of
what this list is about. It has more to do with exchanging ideas and
thoughts by those to care about what they do. I find them all participants
in the task of better understanding of what we do.
RR
>Ron,
>
>like I have told you many times :
>
>"While in a foreign country,
>do like the citizens of that country."
>
>Maybe, you and your followers should stage
>a huge "Ban The Barium Demonstration" in
>front of FDA's offices in Washington; like
>we staged "Ban The Bomb Demonstrations"
>in fifties, the results were not so spectacular.
>
>And, check what will happen.
>Edouard Bastarache
Ron Roy
RR#4
15084 Little Lake Road
Brighton, Ontario
Canada
K0K 1H0
John Britt on wed 19 dec 07
Ron,
So is it acceptable to you to use 2% barium carbonate in a celadon that
has been tested with acceptable leach levels?
Wondering,
John Britt
www.johnbrittpottery.com
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