Edouard Bastarache on sun 13 nov 11
Not toxic !!!
Gis,
Edouard Bastarache
Spertesperantisto
Sorel-Tracy
Quebec
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----- Original Message -----
From: "Jeff Guin"
To:
Sent: Sunday, November 13, 2011 7:38 AM
Subject: Magnesium Carb.
I recently came up with some nice low fire glazes using magnesium
carbonate. My favorite test tile had the addition of 15% magnesium
carbonate which created some nice crawling resembling a high fire shino.
Can anybody tell me about the toxicity of Magnesium carb? I would like
to use this on my raku fire tea bowls.
Thanks.
Jeff Guin
Coon Valley, WI
Steve Slatin on sun 13 nov 11
Jeff -- Magnesium carbonate will disassociate during normal firing (so unle=
=3D
ss you badly underfire=3D0Ayour raku).=3DA0 The remaining magnesium oxide o=
r ma=3D
gnesium metal is not especially toxic, and not too=3D0Astrongly soluble in =
wa=3D
ter, IIRC.=3D0A=3DA0=3D0AThe thing to remember is that it is soluble in aci=
ds, so=3D
avoiding acidic=3DA0contents would be a safety=3D0Ameasure.=3D0A=3D0ASteve=
Slatin =3D
-- =3D0A=3D0A=3D0AN48.0886450=3D0AW123.1420482=3D0A=3D0A=3D0A______________=
______________=3D
____=3D0AI recently came up with some nice low fire glazes using magnesium=
=3D0A=3D
carbonate. My favorite test tile had the addition of 15% magnesium=3D0Acarb=
on=3D
ate which created some nice crawling resembling a high fire shino.=3D0ACan =
an=3D
ybody tell me about the toxicity of Magnesium carb? I would like=3D0Ato use=
t=3D
his on my raku fire tea bowls. =3D0AThanks.=3D0AJeff Guin
Jeff Guin on sun 13 nov 11
I recently came up with some nice low fire glazes using magnesium
carbonate. My favorite test tile had the addition of 15% magnesium
carbonate which created some nice crawling resembling a high fire shino.
Can anybody tell me about the toxicity of Magnesium carb? I would like
to use this on my raku fire tea bowls.=3D20
Thanks.
Jeff Guin
Coon Valley, WI
Steve Mills on mon 14 nov 11
Magnesium Carbonate (Light) is often used in table salt to improve "flow".
I think that might answer your question!
Steve M
Steve Mills
Bath
UK
www.mudslinger.me.uk
Sent from my Ipod touch
On 13 Nov 2011, at 12:38, Jeff Guin wrote:
> I recently came up with some nice low fire glazes using magnesium
> carbonate. My favorite test tile had the addition of 15% magnesium
> carbonate which created some nice crawling resembling a high fire shino.
> Can anybody tell me about the toxicity of Magnesium carb? I would like
> to use this on my raku fire tea bowls.
> Thanks.
> Jeff Guin
> Coon Valley, WI
John Britt on tue 15 nov 11
Magnesium carbonate is not toxic as far as I know. Magnesium matte glazes=
=3D
are=3D20
some of the nicest glaze out there.=3D20
You can certainly add it to Raku glazes. There are lots of lichen and cr=
=3D
awl glazes=3D20
for low fire.
Beads cone 05
33.3 Magnesium Carbonate
26.7 Borax
33.3 Gerstley Borate
6.7 Silica
6.7 Zircopax
Depending on what temperature you fire to (in your raku), you can just ad=
=3D
d more=3D20
frit or less magnesium carbonate to your liking,
John Britt Pottery
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