Brad Sondahl on tue 17 may 11
Is there a good list of glaze chemicals somewhere with a rating of
each on how hazardous they are, in the raw state and for leaching? If
not, does anyone feel competent to draw up such a list for our
enlightenment? I know each chemical has its MSDS data, but it would be
nice to put them all in perspective.
When I was in college in the 70's the art department had a pottery
studio but no teacher, so it was run by the more experienced students
clueing in the the less experienced ones. So you'd hear things like
Vanadium Pentoxide makes a nice yellow, but it's really dangerous.
Even I had heard of Uranium, which we had on our shelves, and I had
read it made a nice yellow and mixed up a batch. At that time masks
and rubber gloves were not common in the studio, except for mixing
clay (I've suffered no ill effects to date from my ignorance).
I thought of this since Nickel Carbonate is currently being discussed,
and I'd heard along the way it was on the naughty list, and have
avoided it, along cadmium, lead, and barium, with little actual data
to go on. (I realize many people use barium and it's not on many
people's naughty list--it just happened to end up on mine).
Brad Sondahl
http://www.sondahl.com
Edouard Bastarache on tue 17 may 11
Toxicology Ceramics Glass and Metallurgy
http://toxicologyceramics.blogspot.com/
Gis,
Edouard Bastarache=3D20
Spertesperantisto=3D20
Sorel-Tracy
Quebec
http://www.flickr.com/photos/30058682@N00/
http://edouardbastarache.blogspot.com/
http://www.facebook.com/edouard.bastarache
http://blogsalbertbastarache.blogspot.com/
----- Original Message -----=3D20
From: "Brad Sondahl"
To:
Sent: Tuesday, May 17, 2011 12:22 PM
Subject: Glaze Chemicals-- naughty or nice?
> Is there a good list of glaze chemicals somewhere with a rating of
> each on how hazardous they are, in the raw state and for leaching? If
> not, does anyone feel competent to draw up such a list for our
> enlightenment? I know each chemical has its MSDS data, but it would be
> nice to put them all in perspective.
> When I was in college in the 70's the art department had a pottery
> studio but no teacher, so it was run by the more experienced students
> clueing in the the less experienced ones. So you'd hear things like
> Vanadium Pentoxide makes a nice yellow, but it's really dangerous.
> Even I had heard of Uranium, which we had on our shelves, and I had
> read it made a nice yellow and mixed up a batch. At that time masks
> and rubber gloves were not common in the studio, except for mixing
> clay (I've suffered no ill effects to date from my ignorance).
> I thought of this since Nickel Carbonate is currently being discussed,
> and I'd heard along the way it was on the naughty list, and have
> avoided it, along cadmium, lead, and barium, with little actual data
> to go on. (I realize many people use barium and it's not on many
> people's naughty list--it just happened to end up on mine).
> Brad Sondahl
> http://www.sondahl.com
>
James Freeman on wed 18 may 11
On Tue, May 17, 2011 at 12:22 PM, Brad Sondahl wrote:
Is there a good list of glaze chemicals somewhere with a rating of
each on how hazardous they are, in the raw state and for leaching? If
not, does anyone feel competent to draw up such a list for our
enlightenment? I know each chemical has its MSDS data, but it would be
nice to put them all in perspective.
Brad...
I started to do this when I was working out of the studios at the local
college. Taking a cue from a wonderful Thai restaurant I visited who
followed each menu entry with from one to five chili peppers to denote how
much of one's oral and gastric mucosa one might expect to lose, I started
affixing three labels to each material's container, one each for
"Inhalation", "Skin Contact", and "Ingestion", each followed by a series of
one to five skulls and crossbones to denote relative risk. The MSDS book
was on the shelf with the chemicals, but the 16 feet of dust covering it wa=
s
testament to the fact that it was little used, and I thought the skulls
would serve as a quick visual reminder that the glaze lab should not be
taken lightly.
I soon removed the labels, however. Beside upsetting the powers that be by
having no skulls following "Inhalation" on the barium carb container, but
five skulls following "Inhalation" on the dry clay bins, I realized that I
was just setting myself up for a lawsuit. Funny world the trial lawyers
have created; go beyond the OSHA laws and try to help people quickly grasp
the existence of risk, and one opens oneself up to having one's life torn
asunder by a predatory lawsuit, yet stand idly by and hide behind the MSDS
book (with only a verbal caution when you personally see something bad
happening), and you remain unassailable. Sick, sick society created by a
lottery mentality fueled by contingency fees. But I digress.
All the best.
...James
James Freeman
"...outsider artists, caught in the bog of their own consciousness, too
preciously idiosyncratic to be taken seriously."
"All I say is by way of discourse, and nothing by way of advice. I should
not speak so boldly if it were my due to be believed."
-Michel de Montaigne
http://www.jamesfreemanstudio.com
http://www.flickr.com/photos/jamesfreemanstudio/
http://www.jamesfreemanstudio.com/resources
Steve Mills on wed 18 may 11
In the UK we are required to supply MSDS sheets with all shipments of new o=
r=3D
ders, which creates a paper mountain no Teacher or Maker wants in a classro=
o=3D
m or Studio.=3D20
At Bath Potters' Supplies, we solved this potential problem by putting ALL =
M=3D
SDS of every product we sold on a CD which every customer could take away f=
o=3D
r free and download to their computer!!
No dust! Instant access!
Steve M
Steve Mills
Bath
UK
www.mudslinger.me.uk
Sent from my Ipod touch
On 18 May 2011, at 11:55, James Freeman wrot=
e=3D
:
> On Tue, May 17, 2011 at 12:22 PM, Brad Sondahl wrote:
> Is there a good list of glaze chemicals somewhere with a rating of
> each on how hazardous they are, in the raw state and for leaching? If
> not, does anyone feel competent to draw up such a list for our
> enlightenment? I know each chemical has its MSDS data, but it would be
> nice to put them all in perspective.
>=3D20
>=3D20
>=3D20
>=3D20
> Brad...
>=3D20
> I started to do this when I was working out of the studios at the local
> college. Taking a cue from a wonderful Thai restaurant I visited who
> followed each menu entry with from one to five chili peppers to denote ho=
w=3D
> much of one's oral and gastric mucosa one might expect to lose, I started
> affixing three labels to each material's container, one each for
> "Inhalation", "Skin Contact", and "Ingestion", each followed by a series =
o=3D
f
> one to five skulls and crossbones to denote relative risk. The MSDS book
> was on the shelf with the chemicals, but the 16 feet of dust covering it =
w=3D
as
> testament to the fact that it was little used, and I thought the skulls
> would serve as a quick visual reminder that the glaze lab should not be
> taken lightly.
>=3D20
> I soon removed the labels, however. Beside upsetting the powers that be =
b=3D
y
> having no skulls following "Inhalation" on the barium carb container, but
> five skulls following "Inhalation" on the dry clay bins, I realized that =
I=3D
> was just setting myself up for a lawsuit. Funny world the trial lawyers
> have created; go beyond the OSHA laws and try to help people quickly gras=
p=3D
> the existence of risk, and one opens oneself up to having one's life torn
> asunder by a predatory lawsuit, yet stand idly by and hide behind the MSD=
S=3D
> book (with only a verbal caution when you personally see something bad
> happening), and you remain unassailable. Sick, sick society created by a
> lottery mentality fueled by contingency fees. But I digress.
>=3D20
> All the best.
>=3D20
> ...James
>=3D20
> James Freeman
>=3D20
> "...outsider artists, caught in the bog of their own consciousness, too
> preciously idiosyncratic to be taken seriously."
>=3D20
> "All I say is by way of discourse, and nothing by way of advice. I shoul=
d=3D
> not speak so boldly if it were my due to be believed."
> -Michel de Montaigne
>=3D20
> http://www.jamesfreemanstudio.com
> http://www.flickr.com/photos/jamesfreemanstudio/
> http://www.jamesfreemanstudio.com/resources
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