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anne mossman

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About anne mossman

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  1. Bloating On Refired Porcelain

    Yes I'm almost convinced I should go to a cone 6 body so I'll start some experiments with the colourants in the next few weeks. But I'll also check the (electric) kiln with cones as well. Thanks for your input.
  2. Bloating On Refired Porcelain

    Thanks for the answers and questions. The colourants are both body stains and oxides and I've been using them in the slip cast work for a long time so I'm very familiar with the issues so I've discounted that. Also the plain white body is bloating so it's the clay body not the additions causing the issue. I fire in oxidation in a small 3.8cuft brick kiln made by a local Australian manufacturer, Tetlow. I'm happy with the kiln and it seems to fire fairly evenly. The slip cast pieces were from the same body of clay, I make up the slip myself. I'm beginning to orient towards changing the clay body to a cone 6 type.......it's just that change factor, moving from something you've been so familiar with for 8 years. I was hoping to resolve this issue that I have not come across before thinking it might be something fairly simple but it doesn't look like it is. This is a pic of the work I'm waiting to refire but I think I may repair a couple of cracks with gold leaf instead of having it fire again and be all bloated.
  3. I use Southern Ice porcelain, bisque fired then sanded then fired to cone 9 and sanded again, I don't use glazes. I have started making complex neriage coloured work, using the same clay body. I sometimes develop fine cracks that can successfully be patched and refired to cone 9 but the result is an all over tiny bloating of the surface. I have read a lot about bloating and the possibility it is due to over firing but don't really know what that means. I have twice fired thinner, slip cast work (from the same clay) without developing this problem. Could it mean I need to slow down the firing at one or more stages?
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