gczop
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Posts: 202
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Post by gczop on Oct 4, 2019 11:11:33 GMT -6
Baffled by the results of your post firing reductions? You are not alone. The cone 10 glaze for these pieces is based on the Chinese Jun composition which is essentially 70% silica and 10% alumina, remainder flux. Substituting EPK for flint (about half) draws the composition into the celadon range. All have 1% CuCarb and 1% Tin Ox. The fine crackle for the bottle is using neph sy and silica instead of a potash feldspar. Large crackle piece (Guan replica, celadon composition) uses Mahavir (=Custer) feldspar. All post firing reduction except the bottle in an electric kiln with propane. Cheers, Gordon (image posted on imgg.com)
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gczop
Full Member
Posts: 202
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Post by gczop on Nov 25, 2019 9:56:23 GMT -6
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Post by serian on Nov 26, 2019 6:43:30 GMT -6
Very nice! Is it copper reduction-red or red with stains?
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Post by tileman2 on Nov 26, 2019 9:26:10 GMT -6
Excellent pieces Gordon.
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gczop
Full Member
Posts: 202
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Post by gczop on Nov 26, 2019 9:35:57 GMT -6
Appreciate the comments. Its a cone 10 firing, 1% CuCarb in the glaze. Post firing reduction with propane. Cheers, Gordon
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Post by evan cornish-keefe on Dec 6, 2019 21:04:08 GMT -6
Incredible Gordon!
I think the fine crackle in oxidation is my favorite color, but those Mo crystals pop in a way I don't think I've seen before, as if the Powellite crystals are resisting reduction (now that I think of it, some reduced Zinc Silicate crystal glazes seem to do the opposite, with red crystals in oxidized glass) just what pops into my head without any real idea of whats going on.
Really great work!
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Post by hollymckeen on Dec 15, 2019 14:44:28 GMT -6
Haven’t been here in awhile - not sure if I can still photobucket ☺️ But will try this...  this one has a light teal crystalline with my own copper red formulation. Love the lustre. |
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