The story of my trials with textural stoneware has been a long drawn out affair, with lots of experimentation- and a fair degree of success and failure along the way. It's documented here on the blog, with early tests recorded in about 2012- but in truth I've been dabbling a lot longer without much in the way of luck- and a lot of melted kiln shelves! The appeal of crater/lava/volcanic glazing lies in the directness and spontaniety of the effect- which seems somewhat akin to the immediacy and spirit of Raku, and it's randomn unpredictability.
I settled on a base volcanic glaze with a thick white matte glaze which is applied over the top of the bisque pot. This has about 4-5 percent of silicon carbide within the base volcanic glaze recipe which of course reacts and bubbles in the glaze firing. I fire to 1240c in oxidation, and the beauty of this particular technique is that if the glaze bubbled too violently -it can be rubbed back with a stone- glaze re applied and re-fired- multiple times till the desired surface is achieved.
I've used a white ash glaze which is a semi gloss using ash saved from our Rayburn stove. It creates a nice contrast. I also have to name check a Stephen Murfitt recipe for bronze- black - and again this seems to pair well against the white finish of the lava and ash glazes. I use this in the foot of the bowls and tea bowls.
At the moment I've tried these on thrown ware, but I'm hopeful it might work well on sculptural forms allowing me to progress with the surfaces in addition to my work in raku. It's been a long time coming but it feels like the start of something new at last.
I settled on a base volcanic glaze with a thick white matte glaze which is applied over the top of the bisque pot. This has about 4-5 percent of silicon carbide within the base volcanic glaze recipe which of course reacts and bubbles in the glaze firing. I fire to 1240c in oxidation, and the beauty of this particular technique is that if the glaze bubbled too violently -it can be rubbed back with a stone- glaze re applied and re-fired- multiple times till the desired surface is achieved.
I've used a white ash glaze which is a semi gloss using ash saved from our Rayburn stove. It creates a nice contrast. I also have to name check a Stephen Murfitt recipe for bronze- black - and again this seems to pair well against the white finish of the lava and ash glazes. I use this in the foot of the bowls and tea bowls.
At the moment I've tried these on thrown ware, but I'm hopeful it might work well on sculptural forms allowing me to progress with the surfaces in addition to my work in raku. It's been a long time coming but it feels like the start of something new at last.
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