ret on wed 5 aug 98
from Monona
---------- Forwarded message ----------
Date: Wed, 5 Aug 1998 08:14:37 -0400
From: Monona Rossol <75054.2542@compuserve.com>
To: ret
Subject: Re: toxicity strontium (
---------- Forwarded message ----------
Date: Tue, 4 Aug 1998 08:58:21 EDT
From: Louis Katz
To: CLAYART@LSV.UKY.EDU
Subject: Re: toxicity strontium
----------------------------Original message----------------------------
Oddly enough, one MSDS for Strontiujm Carbonate lists Barium Carbonate
as an impurity 1%.. Chemical Products Corp. All Grades.
Louis Katz lkatz@falcon.tamucc.edu
___________________________________________
Nothing odd about it. Mother Nature is not interested in quality control.
She likes to put barium and strontium in the same deposits.
I think potters should try to include a good course on geology in their
education. For example, we use stuff that was deposited by ancient streams
and rivers called sedimentary clays that are a combination of everything that
was in the stream during spring floods as well as all the rocks and soils
that the stream ran over on its way.
There are many impurities in most of the products we use. They only have to
be reported by law on MSDSs if they are toxic and occur in amounts over 1%
or if they are cancer-causing and occur in amounts over 0.1%.
Get MSDSs on all you materials. They really are important.
Monona Rossol, industrial hygienist
Arts, Crafts and Theater Safety
181 Thompson St., # 23
New York NY 10012-2586 212/777-0062
http://www.caseweb.com/acts/
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