Friday, 20 March 2015
Eclipse: Moon Bowls in Black Stoneware Clay
Today we had a solar eclipse. The plan was perfect. Fire the kiln on Thursday (yesterday) so this morning I could watch the eclipse in the garden while I waited for the kiln to cool down. Unfortunately a thick blanket of cloud obscured the entire event! And although it went quite dark around 9.30am (during which time we had a nice piece of carrot cake and a cup of tea) it mostly felt the same as if it was about to start raining. Oh well, never mind! Hopefully the bisque kiln will be fine though and I'll be able to crack it soon and start glazing some pots.
In the meantime - as it's topical - I thought I'd blog about my moon bowls. I've been experimenting with different stoneware clays in the past year or so. One of these clays is a deep black stoneware designed mostly for modelling or sculptural pieces. It can also be used as a throwing clay however - in small doses. It has a very high iron and grog content which makes it very coarse to handle when making. This is perfect for hand modelling but when it comes to throwing (with the wheel spinning round) it feels like your hands are being shredded by sandpaper! When I first used it I raised the roof and could only manage to make one small bowl before I gave up and plastered my poor hands in E45. (People who throw porcelain have no idea...!)
Since then I have modified the original black clay by adding in some of my usual stoneware to make throwing more comfortable. This produces a lovely deep chocolate brown colour when fired and left unglazed. So far I've only used a white glaze on this clay. My usual satin white glaze reacts differently on this clay body producing a really interesting pitting effect. This instantly reminded me of craters on the moon, especially when used on little round bowl shapes. Hence calling them moon bowls.
Would you believe it, as I type the sun is actually coming out?! Time for more tea (maybe another piece of carrot cake) and to check the kiln temperature I think. In the meantime, here's a picture of some more pots and ceramic spoons I've been making with my lovely black/chocolate brown stoneware clay. Enjoy!