mattycripps Posted October 9, 2019 Report Share Posted October 9, 2019 Hi! I’ve recently been doing a lot of experiments with clay deposits I’ve found as well as other found materials used in clay or glazed. I’ve been doing a lot of testing with wedging a lot of coarse granite into my clay. It makes it rough to throw with but my hands are tough enough it doesn’t bother me. I’ve usually been applying a found quartz and wood ash glaze that I’ve formulated to these pieces at cone 6 (lots of GB). The glaze gives a nice amber finish and seems to be helping the granite flux as it runs a bit giving nice variation, colour, and texture. My current test are going to include wedging the granite into a clay I found that can be fired up to cone 6 and I’m excited for these results. Does anyone have any tips regarding granite being added to clay, good glaze combos with found rough granite filled textures, other good experiments with found materials, etc?? Thanks! Matt Link to comment Share on other sites More sharing options...
C.Banks Posted October 9, 2019 Report Share Posted October 9, 2019 Working with found material in a slip is a good option. Matt Fiske has done a lot of work in this area. Link to comment Share on other sites More sharing options...
CactusPots Posted October 9, 2019 Report Share Posted October 9, 2019 Some time ago I ran a melt test on my local decomposed granite. Sieved to about 60 grit, it melts evenly at cone 10 to a matt black. Obviously has a lot of iron in it. Good idea I think to run individual component melt tests. I haven't really tried anything further with it, but now that I'm turned on to the Magma product, maybe I will. Link to comment Share on other sites More sharing options...
Hulk Posted October 9, 2019 Report Share Posted October 9, 2019 magma, see https://community.ceramicartsdaily.org/topic/19956-yellow-saltblue-salt/?tab=comments#comment-159652 Link to comment Share on other sites More sharing options...
fergusonjeff Posted October 10, 2019 Report Share Posted October 10, 2019 My new favorite pots are tea bowls thrown with lots of decomposed granite (from bags of chicken grit from the feed store). Works really well in cone 10+ wood fire. the granite chunks are mostly between 1/8 and 1/4 inch in diameter. Throwing is not too bad, but trimming is tough. Link to comment Share on other sites More sharing options...
C.Banks Posted October 10, 2019 Report Share Posted October 10, 2019 The use of natural clay embedded with coarse feldspar is also a signature of wood fired Shigaraki ware. There is evidence of Japanese Shigaraki kilns dating back to the 13th century. Shiro Otani Link to comment Share on other sites More sharing options...
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