Monona Rossol on fri 16 apr 99
---------- Forwarded message ----------
Date: Thu, 15 Apr 1999 07:52:53 EDT
From: Paul Lewing
To: CLAYART@LSV.UKY.EDU
Subject: bisque dust
----------------------------Original message----------------------------
Here's a question I've been wondering about for some time. We talk a
lot about the dangers of clay and glaze dust, but is there any
difference in toxicity between unfired clay dust and dust that has been
bisqued? I was blowing dust off some bisqued stuff ( into my spray
booth) and was curious.
Paul Lewing, Seattle
---------------------------------------------------------------------------
Silica in clay is most often in the quartz form
Silica that has been fired usually is in either the cristobalite or tridymite
form. These forms are about twice as toxic as quartz to the lung:
TLV quartz = 0.1 mg/m3
TLV tridymite and cristobalite = 0.05 mg/m3
Monona Rossol
ACTS
181 Thompson St., # 23
New York NY 10012-2586 212/777-0062
| |
|
