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toxic materials...

updated thu 31 oct 96


Rebecca Huston on tue 22 oct 96

I have been wanting to use some coloring oxides and other materials for
glaze testing, but have run into a problem.

When I read about those materials that I already know are toxic I find
no refrence what so ever that tells they are toxic. This makes me wonder
if the materials I am researching (that I know very little about) are
toxic or not. (there seems to be nothing stated about any potential
dangers so far).

So here is a list I have compounded of materials that I want more
information on. I have added what I know of toxicity for some, but I
have found from asking other students that some materials are more toxic
than some refrences sugest. And if anyone can add in what state (type of
use: skin contact, fumes from firing, ect..) the
material is toxic it would help me to find the safest possible way to use

Chromes and chromates- Fumes from firing are potentially toxic
Manganese Dioxide- toxic, avoid skin contact
Nickle oxides- toxic
Vanadium pentoxide- Toxic by fumes and skin contact
Bentonite- ?
Barium- toxic, avoid skin contact
Cobalt- toxic by ingestion

Also If anyone has any materials to add to this list that are toxic it
would be extreemly helpful!
Or if there are any complete refrences on toxicity of glaze materials
please notify me.

Rebecca Huston

Kerr - M. Christine on wed 23 oct 96

Rebecca: by federal law, the MSDS (materials safety data sheet) on any
chemical bought must be made available by either the manufacturer or the
distributor. if they dont actually have one, they must tell you how to
get one. The MSDS will tell you everything you wand/need to know about
any chemical you would ever have occassion to use. ( I bought some
silicone glue from a local "homeowners hell" store recently and on the
package was a address to write to and a # to call to get a msds.
a more general reference, quite complete is something called "the merck
index" This book is one of the most widely used chemical encyplopedia in
the world. It is available form Merck & Co., Inc
Rahway, NJ 07065. Good luck chris

Sandra Dwiggins on thu 24 oct 96

>called "the merck index" This book is one of the most widely used
>chemical encyplopedia in the world. It is available form Merck & Co., Inc
>Rahway, NJ 07065. Good luck chris

Or available at any technical library------I wouldn't suggest ordering one,
it costs quite a bit.

Richard Burkett on thu 24 oct 96

Christine Kerr was talking about MSDS availability:

There is also a link from the CeramicsWeb to a MSDS database online. Most of
the materials listed there are more likely to be found in a chem lab than a
pottery studio, but most of the raw chemical oxides and carbonates used by
ceramists will be listed.

Richard Burkett - School of Art, Design, & A.H, SDSU, San Diego, CA 92182-4805
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