Lewis J Crittenden on fri 26 jan 01
There are more problems in combining clay and glass than the expansion of
both. Glass needs to go through an annealing process to remove internal
stress. Also, glass will devitrify when held at temperatures above the
1500F-1800F range for too long of a period. This period of time can be a
few hours. To fire to cone 10 and then cool back down below this range
will take a few hours. For anyone interested in glass, the fifth chapter
of a book called "Glass An Artist's Media" by Lucartha Kohler has been
helpful to me.
Jeff Campana on sat 27 jan 01
Lewis
Thanks for the info. Perhaps I need to be a bit more clear on the process i will
be trying, though. The glass studio that i will be working at is 50 miles from my
ceramics studio. I will fire the ceramic parts to cone 10, then cool them, and
pack them into my car. I will then meet my partner at the glass studio, we will
bring the ceramic up in one of the annealers, then blow glass into them hot, then
cool and anneal as they normally do. The goal here is to have a complete, fused
peice with no cracks. I think the glass will fuse to the ceramic if the cermic is
heeted up to 1000-1200, so it will then act as a really thick glaze on the inside.
jeff
Lewis J Crittenden wrote:
> There are more problems in combining clay and glass than the expansion of
> both. Glass needs to go through an annealing process to remove internal
> stress. Also, glass will devitrify when held at temperatures above the
> 1500F-1800F range for too long of a period. This period of time can be a
> few hours. To fire to cone 10 and then cool back down below this range
> will take a few hours. For anyone interested in glass, the fifth chapter
> of a book called "Glass An Artist's Media" by Lucartha Kohler has been
> helpful to me.
Dorie Mickelson on fri 27 aug 04
I also recall an article in the May/June 2002 issue of Pottery Making
Illustrated written by Steven Branfman on inlaid glass techniques. He
made some awesome pots that he embedded glass into (on the exterior of
the forms) during the throwing stage. Haven't tried it myself (yet),
but was impressed with the process as well as the results. Of course,
I've always been fascinated by clay/glass combinations, which may not
appeal to everyone, but for more details on this technique, check out
http://www.potterymaking.org/inlaidglass.html.
Dorie in Ann Arbor, Michigan (no relation to Steve Branfman or the
producers of Pottery Making Illustrated ).
www.FreeSpiritCreations.com
===============
At one of the NCECA presentations, I am pretty sure it was Mark Hewitt
from North Carolina that
imbedded some glass in the sides of some of the very huge pots he made.
He had finished pots to
show how the glass melted into a stream down the sides of the pots.
Beautiful.
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