ret on mon 3 mar 97
Monona Rossol wrote today to respond to my comments on mang. fumes
She said:
"Another way to get exposed to mn fumes: Fibre raku kilnsare oftenwired
together with stainless steel wires or buttons. The supplier told me that
when that metal getrs heated it lerts off a substantial aount of mn
fumes."
Stainless steel contains chrome from less than 10% to 25% and sometimes
nickel. A few contain very small amounts of manganese. Chrome and nickel
probably more toxic than manganese. Not much comes off as a fume until the
steel ismetling. That's not happening at these temperatures.
We primarily see manganese fume expossure when welding or cutting with
steels or welding rods that contain manganese.
And when firing manganese in fibre raku kilns, I'd be FAR more worried
about the fibre. Fibre should just not be used for this purpose. If you
doubt me, get the booklets on safe use directly from the fibre
manufacturers themselves. They tell you al the precautions neded to use
fibre safely. And these precautions clearly exclude banging a
fibre-insulated drum around and watching the sun glint off the little air
borne fibre dust particles.
"I've not asked Monona about that one."
Now you have!
Monona
forwarded by:
ELKE BLODGETT email: eiblodge@freenet.edmonton.ab.ca
12 Grantham Place
St. Albert, AB T8N 0W8
403 (458-3445); 403 (727-2395)
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