vince pitelka on sat 13 jan 01
> Some Raku is fragile and some is not. Depends a lot on the clay body, the
> firing etc. Saying all raku is fragile is no more true then saying that
all
> white clay bodies are porcelain, or all raku glazes disappear, or all
> stoneware is strong. Etc., etc.
Paul -
I think the important point is that raku is always very fragile as compared
to high-fired wares. If one is selling wares to the public it is extremely
important to be up-front about such things. The strength of high-fired
wares has to do with the the vitrification of the clay, the annealing
process in
a relatively slow cool-down, and the strength of a high-fired clay-glaze
interface. Raku never has any of those three.
Best wishes -
- Vince
Vince Pitelka
Appalachian Center for Crafts
Tennessee Technological University
1560 Craft Center Drive, Smithville TN 37166
Home - vpitelka@dekalb.net
615/597-5376
Work - wpitelka@tntech.edu
615/597-6801 ext. 111, fax 615/597-6803
http://www.craftcenter.tntech.edu/
Lee Love on sun 14 jan 01
One way to increase the durability of Raku is by not quenching it in water.
I have several chawan/latte' bowls (fatty white glaze, copper decoration)
back in St. Paul that have outlived their stoneware cousins. :^) Water
quenching is not a traditional method for functional ware and it isn't
necessary. Just leave the pot in the reduction material until it is
cool.
--
Lee Love
Mashiko JAPAN Ikiru@kami.com
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