iandol on fri 8 dec 00
Bon jour Yvon,
Pour l'explanation du |Shino, merci.
I had been wondering if some of the Iron colours are due to the =
formation of Ferrites. It is well know that Ferrites form with Barium =
oxide and these are orange brown in colour. Since Iron oxide Fe2O3 seems =
as though it can behave as an amphoteric there seems to be no reason why =
this might not happen with materials which contribute calcium oxide. Is =
this supported by the notes from M. De Montmollin.
With regard to the formation of the surface texture, I would have =
thought that decreasing the surface tension would have caused the fluid =
glaze to flow out more readily.
I had worked out for myself that iron would be migrating from the clay
=C0 bient=F4t mon cher.
Ivor Lewis
Tom Wirt/Betsy Price on fri 8 dec 00
So let's take this Shino color coming from iron one step further.
Maybe the "Carbon Trap" isn't carbon at all, but, rather, reduced
iron????
Wondering??
Tom Wirt
vince pitelka on sat 9 dec 00
> Carbon trapping is not related to iron in any way that I know of. It can
be
> achieved solely with a wash of soda ash on porcelain. Similiarly it can
be
> achieved in celadons on porcelain.
John -
I agree that carbon trapping has nothing to do with iron. But many shinos
carbon trap beautifully on both porcelain and stoneware with no wash of soda
ash.
Best wishes -
- Vince
Vince Pitelka
Home - vpitelka@dekalb.net
615/597-5376
Work - wpitelka@tntech.edu
615/597-6801 ext. 111, fax 615/597-6803
Appalachian Center for Crafts
Tennessee Technological University
1560 Craft Center Drive, Smithville TN 37166
http://www.craftcenter.tntech.edu/
john britt on sat 9 dec 00
Tom,
Carbon trapping is not related to iron in any way that I know of. It can be
achieved solely with a wash of soda ash on porcelain. Similiarly it can be
achieved in celadons on porcelain.
Thanks,
John Britt
Penland Clay Coordinator
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