Marcie McConville on tue 3 dec 96
Deb,
I work with glass and clay but my aim is for the end product to be craze-
free and this will not be achieved with a commercial clay body. As your
work is sculptural you may wish to use the crazing to enhance your pieces
and in many cases the resulting pattern really is quite beautiful!
The old wine bottle route is fine, specialty glass is desirable when you
are fusing glass to glass. The firing temp will also depend on the type of
result you wish to achieve, that is if you want the glass to run it will
need to be taken above 900 degrees C.
As for metal and glass I have attempted to fuse Bullseye glass to a brass
frame (I made the frame in a foundry course) but with disastrous results!
I fired to 800 degrees C approx. but both the glass and brass surfaces were
unacceptable. In the areas where the glass had contact with the brass it
came away in very fine slivers when touched!
Hope this helps and if you have anymore questions please email me ......but
don't hesitate because of off to the west coast of the US on the 13th of
this month!
regards
Marcie McConville in Sydney Australia.
marcie@ozemail.com.au
KEMPB on wed 4 dec 96
Hi Marcie,
Like you, my students and I also play with glass and clay. We have found
through trial and error that we were losing colours like red and yellow if
we fired too high. Initially we tried crushing remnants from a stained glass
studio and sprinkling it onto the flat surfaces of the glazed, bisque ware.
But, at the stoneware temp ( in this case Cone 7) we lost the reds and
yellows and the glass was very badly crazed.
Now we add the glass after the glaze firing and like you, we refire, but we
go slightly higher than you - to 1000 degrees C. We have peogrammed
the kiln to give a 15 minute annealing soak at 555 degrees C on the way
down.
We have virtually eliminated crazing and the colours are rich and vibrant.
I guess it is the luck of the draw with the glass that you use. Bullseye
glass fuses at a lower temp so you would need to test and adjust
accordingly.
Regards,
Brian Kemp. Singapore (ex Geelong, Vic)
kempb@nievax.nie.ac.sg
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