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gil's position on salt a

updated mon 31 mar 97


Monona Rossol on sun 16 mar 97

Monona Rossol wrote:

>>What bothers me is that your question clearly indicates that your
>>teacher needs to go back to school. He/she has no business teaching a
>>hazardous process like this without educating all the students
>>involved about the hazards.

Gil Stengel wrote

> I don't know about your teachers education level but firing a salt kiln
> is at most only slightly more hazardous than firing any other kiln. <

Neither do I, but my teachers didn't know a hell of a lot about hazardous
emissions from reduction and oxidation firing either.

>>I wonder why people keep reinventing the wheel. There were tons of
>>salt glaze emission studies in the Brick Clay Record in the 1930's,
>>1940's, and all the way up through the 60's if memory serves. There
>>probably are even more sophisticated studies in the Ceramic
>>Engineering literature--especially because in most developed
>>countries, large ceramic operations must submit environmental data.

> I'd love to see these emissions studies. I'm unfamiliar with the
> Brick Clay Record. Maybe you could tell us all
> what they say? <

See my post to Gavin Stairs.

> I do not know how much HCl is safe to "snort". <

The TLV-TWA-Ceiling limit is 5 ppm. And teachers who don't know
what this means can't read MSDSs as the OSHA hazard communication standard
requires and they shouldn't be teaching ceramics.

> As for your dead tree limbs, how do you know your kiln killed them? <

If you had seen where the dead stuff was in relation to the stack, common
sense would have told you that this was the cause.

Monona Rossol, industrial hygienist
Arts, Crafts and Theater Safety
181 Thompson St., # 23
New York, NY 10012-2586 212/777-0062