Pieter Mostert
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Everything posted by Pieter Mostert
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I'd love to hear what you learned. It's unlikely I'll have the opportunity to build a reduction electric kiln in the near future, but I'm still interested.
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From the album: Glaze tests
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From the album: Glaze tests
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From the album: Glaze tests
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From the album: Glaze tests
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From the album: Glaze tests
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From the album: Glaze tests
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From the album: Glaze tests
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From the album: Glaze tests
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Seger cone 4 + RIO
Pieter Mostert commented on Pieter Mostert's gallery image in Browse Member Galleries
You're right. The left hand one has 13.5% RIO added. -
Seger cone 4 + RIO
Pieter Mostert commented on Pieter Mostert's gallery image in Browse Member Galleries
Do you mean percentages of iron oxide added? -
From the album: Glaze tests
Fluxing effect of iron oxide in oxidation. -
From the album: Glaze tests
Work in progress. Alumina increases as you go up. Left column replaces some magnesium in the right column with calcium. -
From the album: Glaze tests
Varying alumina and iron in a spotty glaze. Test on white stoneware. -
From the album: Glaze tests
Detail of test on red earthenware. -
From the album: Glaze tests
Varying alumina and iron in a spotty glaze. Test on red earthenware. -
I stuck the Colemanite in a bisque firing to 915 C, which should be around cone 09. Theoretically, Colemanite has an LOI of 21.9%, but I've seen an analysis of 23.7%. I don't have the exact % weight loss of the sample I used in front of me, but I think it was just over 24%, so I doubt there's much carbon left, if any. -
This is just calcined Colemanite in some water in a polystyrene cup. See my post in this thread for more context: http://community.ceramicartsdaily.org/topic/15955-colemanite/ I think the lighter coloured bits floating on the water are thin layers of soluble material that have crystallised. You can also see a ring of white crystals above the water line.
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From the album: Calcined Colemanite
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Calcined Colemanite
Images added to a gallery album owned by Pieter Mostert in Browse Member Galleries
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From the album: Calcined Colemanite
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From the album: Calcined Colemanite
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From the album: LIPGLOSS
