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Showing results for tags 'additive'.
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A friend of mine and I were having a discussion about my horsehair raku pottery and how much he liked my work. He told me he had his folks' ashes in cardboard boxes on a shelf in his garage and was wondering if I'd be interested in making a couple of horsehair Raku urns for him...incorporating some of the ashes in or on the finished piece. I can't see where or how I'd be able to put the ashes ON the finished piece but thought that it might be possible to incorporate the ashes into the clay body itself, either wedging the ash into the clay or possibly pressing the ashes into the surface of the wet jars before drying and firing the pieces. On another tack, he was wondering if it would be possible to mix some of the ashes into a glaze and firing the pieces that way. Since ash glazes tend to run when fired, he suggested glazing the bottom of the pots and firing them upside down so the drips would run UP the pot when sitting right side up. (This suggestion is something I plan to experiment with in my regular pottery work...) I don't have enough experience with clay and glaze chemistry to even have an idea of how to go about this and would appreciate any suggestions that might help with this project. In the research that I've started I found that the basic composition of human ash is as follows with the percentages of the primary components. Anything below .01% is not included: Phosphate 47.5% Calcium 25.3% Sulfate (Sulphate) 11.00% Potassium 3.69% Sodium 1.12% Chloride 1.00% Silica 0.9% Aluminum Oxide 0.72% Magnesium 0.418% Thanks, JohnnyK
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
Hi guys, I'm looking for anything that I can add to my porcelain slip (cone 10) that will result in a fine surface texture. This could be fairly uniform almost sandpaper-y, to just varied and rough. Like below: http://www.walkerceramics.com.au/images/Compressed%20images/BRT%201280%20R%20054.jpg http://claymotion.com.au/wp-content/uploads/2013/05/brtsample.jpg Not necessarily the colors I"m after, more just the texture, but open to any suggestions. Any thoughts would be great!