Alisa and Claus Clausen on mon 20 nov 00
Along the lustre and mother of pearl thread, I apologize if this has =
been mentioned. I admit that I have not
read all of the posts. However, I am wondering if breathing the fumes =
of golds and lustres are
even more hazardous than the average bear. (more precautions necessary =
than when mixing glazes, etc.?)
I recently tried gold on some rims of stoneware; it was fun and worked =
out.
But it really stinks in the paint form. Being semi attracted to stinks =
like fuels, I did not mind it, but got away from it fast. =20
My studio door was open to the outdoors the entire time I painted, but =
the smell lingered quite long in the studio. =20
The bottle came with a long list of health warnings, all in the smallest =
print possible and someI could not translate. =20
I used it in a ventilated studio, but is it also necessary to wear a =
mask when painting with it?
=20
Best regards,
Alisa in Denmark
Snail Scott on mon 20 nov 00
Yep, it's really evil stuff; makes me glad my kiln is outside.
If you use a mask, it would need to be rated for organic
vapors and solvents; the normally adequate 'chemical fume' mask
won't help, and an ordinary dust-and-vapor mask is useless. I use
a good fan, blowing across immediate work area, too. I figure that
the nasty smell is actually useful; if I can smell it, there's
not enough ventilation.
Metallic luster overglazes may contain any or all of the following
solvents as a vehicle: benzyl alcohol, benzyl acetate, methylene
chloride, butyl oxalate, camphor, cloroform, soluble nickel, toluene,
clove leaf oil, spike oil of lavender, and possibly others I'm not
aware of.
Don't let nice-sounding herbal names like 'oil of lavender' or 'clove'
lull you into any sense of safety; they're just as toxic as the rest
of those items listed, and worse than some!
These lusters are among the most toxic substances in your studio;
BE CAREFUL!
-Snail
At 09:14 AM 11/20/00 +0100, you wrote:
>Along the lustre and mother of pearl thread, I apologize if this has been
mentioned. I admit that I have not
>read all of the posts. However, I am wondering if breathing the fumes of
golds and lustres are
>even more hazardous than the average bear. (more precautions necessary
than when mixing glazes, etc.?)
>I recently tried gold on some rims of stoneware; it was fun and worked out.
>
>But it really stinks in the paint form. Being semi attracted to stinks
like fuels, I did not mind it, but got away from it fast.
>My studio door was open to the outdoors the entire time I painted, but the
smell lingered quite long in the studio.
>The bottle came with a long list of health warnings, all in the smallest
print possible and someI could not translate.
>I used it in a ventilated studio, but is it also necessary to wear a mask
when painting with it?
>
>Best regards,
>Alisa in Denmark
>
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>
iandol on tue 21 nov 00
Dear Alisa,
Many commercial metallic lustres are based on chemicals called =
Resinates. Being a resin product it has to be diluted. So Toluol or =
Toluene are used to thin the goo down to a paintable consistency. These =
are carcinogens. Manufacturers instructions say to have a well =
ventilated kiln, a well ventilated room and not to be there when it is =
fired. So there is most probably a health hazard when you are painting =
it onto your pots.
They are made by combining salts of the metals in question with Resin or =
Rosin, as in "You have to put rosin on your bow before it will draw a =
sound from a violin string "=20
There is a glorious recipe for the Gold lustre used in Russia for Czar. =
It starts of "Take two kilograms of pure gold". Another source gives a =
recipe which calls for 500 gms of the salt of the metal in question to =
be mixed with Sodium Resinate. I have reacted Ferric chloride with resin =
to get a lustre which fired to a semi metallic sheen with a red orange =
colouration on commercial tiles. Do not do this with Silver nitrate or =
other nitrate salts. You are liable to get a conflagration, even an =
explosion
A lot of Alchemy in this topic.
All the best,
Ivor. Redhill, South Australia
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