Dan Littman on wed 26 jun 96
Has anyone had experience using glass in place of or on top of regular glaze?
I saw a piece recently that had clear glass melted on top of colored glazes
and it was spectacular, but I wasn't able to talk to the artist to find out
how he did it. I was also wondering how colored glass from broken bottles
works. Thanks. -- Dan Littman (in the Bay Area, where it's cold, foggy and
windy at noon on a June day)
Leslie Ihde on thu 27 jun 96
Dan,
I just put some 1/4" to 1/2" shards of clear glass over some blue glazes
and
fired at cone 4 getting some great results. If put on a a vertical
surface, it drips down since I believe glass melts at around 1000 degrees
unlike my glazes. I just broke the glass with a hammer with the glass
inside a brown paper bag- a safer way exists, I'm sure, but I pounded
gently.
When I tried beer bottles and green wine bottles, it didn't look
as pretty- just dull. The clear glass made wonderful crackles and fully
revealed the glaze color of the turquiose matte beneath.
Leslie
Vestal, NY
David Hewitt on fri 28 jun 96
Hello Dan,
Regarding your question about using glass in place of or on top of a
regular glaze. For a number of years I regularly made some small flat
dishes with glass from broken wine bottles in the bottom and over a
glaze. The results can, as you say, be spectacular and certainly attract
attention.
The glass bottles, I broke into pieces about 1/4 inch to 1 inch. They
were, of course irregular in shape. You want pieces, not small particles
or the dust. Keep the different coloured glass in separate bags or
containers so that when you put the pieces in the bottom of a dish you
can select a variety of different colours and arrange them in the dish.
I glazed the dish first in the normal way,dipped or sprayed, and the
area covered with pieces of glass was in the range of 2 inches to 5
inches. The firing was to suit the glaze. I made no difference to the
firing cycle because some items had glass in the bottom.
The coefficient of expansion of glass is much greater than that of any
clay body and so the glass will craze when it cools down. You may expect
it to continue in this process of crazing for some time after it has
reached room temperature and the crystal like structure under the
surface will grow. Let it cool down well before removing from the
kiln. I have known it to actually break a dish by separating the base
from the sides. This is why you will find it sensible to consider the
shape and size of the item to avoid such problems.
Try it out with just a small dish or bowl to start with. The amount of
glass in each item should be enough, when melted, to cover the bottom of
the dish about 1/8 inch thick. Spread the glass pieces over the are to
be covered and so judge the thickness.
Hope you are successful with this. It is really very easy. I only hope I
haven't forgotten anything important to pass on.
David Hewitt
David Hewitt Pottery Caerleon, Newport, Gwent, UK.
URL http://digitalfire.com/magic/hewitto.htm
Claudia Louise Palermo on mon 1 jul 96
On Wed, 26 Jun 1996, Dan Littman wrote:
> ----------------------------Original message----------------------------
> Has anyone had experience using glass in place of or on top of regular glaze?
> I saw a piece recently that had clear glass melted on top of colored glazes
> and it was spectacular, but I wasn't able to talk to the artist to find out
> how he did it. I was also wondering how colored glass from broken bottles
> works. Thanks. -- Dan Littman (in the Bay Area, where it's cold, foggy and
> windy at noon on a June day)
>
> I have used glass (both stained glass and glass from bottles on top of
glaze. THe more colorful your glass the prettier your work, however if
the glass is thick it tends to crack on cooling, or is so thick it just
pools. I suggest breaking up your glass into small fragments, and of
course make sure it doesn't drip onto your shelves. The results can be
really nice! Good luck. (Oh, I generally fire electric any where from 06
to 6.
Claudia Palermo -- (in New York where the summer feels like spring, and
spring like winter - what a winter it was!)
>
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