Gareri PIKE TWP SCHOOL on sun 31 mar 96
Can't find my notes and searched archives, with no results.
I have a glaze I used to use Cone 4-8 Ox
contains 5.9% barium Carb.
Can you substitute Strontium Carb? What percent?
Base
Neph Sye 34.1%
EPK 1.8%
Colemanite
or Gerstley
Borate 16.3%
Silica 31.8%
Whiting 3.9%
Zinc 6.1%
Barium carb. 5.9%
Bentonite 2.0%
Charles Gareri
Pike High School Art Dept.
Indianapolis, IN
David McBeth on tue 2 apr 96
>----------------------------Original message----------------------------
>Can't find my notes and searched archives, with no results.
>
>I have a glaze I used to use Cone 4-8 Ox
>contains 5.9% barium Carb.
>Can you substitute Strontium Carb? What percent?
Try substituting the Barium with 75% Stontium. In this case 4.425 %
Strontium should replace the Barium. Test and compare your results with
the original glaze.
David McBeth, MFA Office Phone: 901-587-7416
Assistant Professor of Art email - dmcbeth@utm.edu
330 C Gooch Hall
University of Tennessee at Martin
Martin, TN 38238
marie elaine on thu 3 sep 98
Given the health concerns about the use of Barium, I understand that 0.75
Strontium Carbonate may be used as a substitute for every 1.00 part of
Barium Carbonate.
Why is this? Will it effect the firing range? Color? Surface Texture?
Has anyone else tried this? Appreciate your comments. marie elaine
Paul Lewing on fri 4 sep 98
marie elaine wrote:
>
> ----------------------------Original message----------------------------
> Given the health concerns about the use of Barium, I understand that 0.75
> Strontium Carbonate may be used as a substitute for every 1.00 part of
> Barium Carbonate.
>
> Why is this? Will it effect the firing range? Color? Surface Texture?
>
> Has anyone else tried this? Appreciate your comments. marie elaine
Marie, this is the right formula for substitution to get more or less
the same surface texture at the same temperature. Color is another
matter, however. Many colors will be close to the same, but strontium
doesn't give the intense colors that barium does with copper and
cobalt. They can be pretty, but they're just different. I've been
working lately on a chrome yellow with streaks of green in it in a
barium base. I should try that with the strontium. Hmmm. More
testing.
Paul Lewing, Seattle
Lee Marshall on sat 5 sep 98
I've tried it with a beautiful copper blue that when I switched to strontium
turned a blah green with some red. Surface texture remained the same soft
matte but was very unhappy with the color response.
Lee Marshall
the hot tub just came in so pottery is off the priority list for a few days
lmarsh1220@aol.com
F.Chapman Baudelot on thu 2 may 02
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It is true that Strontium 90 is dangerous and radioactive. However, I=20
don't think this applies to strontium carbonate which is far less toxic=20
than barium carbonate. Here is a data sheet from the web:
>General
>Synonyms: carbonic acid strontium salt
>Molecular formula: Sr CO3
>CAS No: 1633-05-2
>EINECS No: 216-643-7
>Physical data
>Appearance: grey or white powder
>Melting point:
>Boiling point: 1700 C
>Vapour density:
>Vapour pressure:
>Density (g cm-3): 3.7
>Flash point:
>Explosion limits:
>Autoignition temperature:
>Water solubility: 0.011 g/l at 18 C
>Stability
>Stable. Incompatible with strong acids.
>Toxicology
>May act as a skin, eye or respiratory irritant.
>Risk phrases
>R36 R37 R38.
>Transport information
>Non-hazardous for sea, air or road transport.
>Personal protection
>Safety glasses.
Fran=E7oise in Spain
http://indalopottery.tripod.com/fenix.html
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bill edwards on sun 3 jul 05
Even though I noticed one or two replies I will add
another one which is easily found at this url.
http://ceramic-materials.com/cermat/education/146.html
Dr. Ed our group environmental toxicologist has
written the forward on this and I bet he has lots more
information.
I use this material often and as always, wear gloves
and a mask to reduce any chronic effects from all
dusts which are hazardous based on exposure and time.
Bill Edwards
Edmar Studio and Gallery
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Edouard Bastarache Inc. on sun 3 jul 05
To my on-line friend Bill Edwards,=20
Toxicological properties=20
=20
Absorbtion =
=20
This product is absorbed by the digestive tract.
=20
Acute Effects=20
One refers to the toxicity of strontium salts :=20
If ingested, purgative effect, abdominal cramps, painfull contractions =
of limbs.
=
=20
Chronic Effects =
=20
In animals : rickets if ingested.
Now, who is going to eat strontium carbonate in the glaze room?
And there is no known toxicity by inhalation or skin contact.
Do not confuse strontium carbonate with suger when mixing you first=20
cup of coffee in the morning.
Later,
"Ils sont fous ces quebecois"
"They are insane these quebekers"
"Est=E1n 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://perso.wanadoo.fr/smart2000/index.htm
http://www.digitalfire.com/education/toxicity/
Link Henderson on mon 3 mar 08
One must be careful when using strontium, for it contains barium. We sell
small quantities here in our shop, as most people don't need a 55# bag of
it and in reading the original packaging, it says 98% strontium, 2%
barium. We buy ours straight from Seaforth Mineral & Ore, an industrial
mineral supply company. It's the same brand sold by most ceramic suppliers
as far as i know.
Not sure if other brands are that way or if the two (strontium &
barium)happened to be mined together, just thought I'd point that out.
thanks--
Link Henderson
www.kentuckymudworks.com
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