Elke Blodgett on thu 4 nov 99
from Monona
> From: Tasha Olive
> Reply-To: Ceramic Arts Discussion List
> To: CLAYART@LSV.UKY.EDU
> Subject: Re: Electric kiln fumes
> Resent-Subject: Re: Re: Electric kiln fumes
>
> ----------------------------Original message----------------------------
> Yes, there are DEFINITELY fumes from the bisque kiln. I have heard
arguments
> that the fumes from the bisque are worse for you than the glaze firings.
I'm
> surprised that some of our really knowledgeables are not giving us the
goods
> on this subject. Tasha
> -----Original Message-----
> From: 'Chapatsu' Rob Uechi
> To: CLAYART@LSV.UKY.EDU
> Date: Tuesday, November 02, 1999 8:58 AM
> Subject: Re: Electric kiln fumes
---------------------------------------------
No goods because no time.
Each firing is different depending on whether it is bisque, glaze, high fire,
low, wax resists, paper clay, electric, gas, oxidation, reduction, and on and
on.
You have to take all those things into consideration when guestimating the
emissions.
However, most clays contain enough sulfur compounds to give off very
significant amounts of sulfur oxides as bisque temperatures. Then there is
always carbon monoxide and carbon dioxide as organic chemicals burn off.
Burn off also releases dozens of small amounts of other organic chemical
breakdown products.
Glaze firing will burn off stuff from wax, gum stabilizers in glazes, some
sulfur and carbon oxides as certain glaze chemicals degrade, and metal fumes.
So bisque is not necessarily worse than glaze firings, it just that people
are aware of the sulfur oxides because they are so irritating and sensitizing.
Hope this helps.
Monona Rossol
ACTS
181 Thompson St., # 23
NYC NY 10012-2586 212/777-0062
ACTSNYC@compuserve.com
| |
|
