jafa5 Posted April 2, 2018 Report Share Posted April 2, 2018 I've been really fortunate at work to come across a heap of local material, one of the most exciting is a small seam of volcanic ash from Lake TaupeTaupe here in New Zealand, that erupted about 18,000 years ago. I've used a small amount in a few small batches which has been really good but wanted to ask if it's likely to work as a glaze if I just sprinkle the ash direct onto the wet clay? Today I made a couple of rough textured chawan bowls and I thought they might be worth trying for a single firing with the ash just thrown onto the wet clay. Or am I better to biscuit them, add a glaze and throw some ash onto the wet glaze? Any tips from frequent ash users? Novice here, so please excuse any ludicrously silly questions above Cheers , Liam Link to comment Share on other sites More sharing options...
oldlady Posted April 2, 2018 Report Share Posted April 2, 2018 i know some very good potters who toss dry ash onto wet glaze. very interesting results, i do not have photos. Link to comment Share on other sites More sharing options...
jafa5 Posted April 2, 2018 Author Report Share Posted April 2, 2018 Thanks Oldlady:) I'll just give it a try! Link to comment Share on other sites More sharing options...
C.Banks Posted April 2, 2018 Report Share Posted April 2, 2018 You might already be aware but fwiw volcanic ash is a naturally fritted feldspar. It can be substiuted directly for feldspar but requires silica. In a glaze it brings a bit of iron so makes a nice celadon(in reduction) and can work in a base for a lifetimes worth of glazes. Link to comment Share on other sites More sharing options...
Marcia Selsor Posted April 2, 2018 Report Share Posted April 2, 2018 I used Mt St. Helen's ash from the 1980 eruption. Volcanic ash is a good feldspar. Look up some recipes. you may get some stunning results by using it in a glaze. http://www.potters.org/subject99294.htm Marcia Link to comment Share on other sites More sharing options...
Tyler Miller Posted April 2, 2018 Report Share Posted April 2, 2018 Bjarni Sigurdsson is someone you may want to check out. Icelandic potter who uses volcanic ash in glazes and clay bodies. It’s a significant part of his artistic practice. Link to comment Share on other sites More sharing options...
jafa5 Posted April 4, 2018 Author Report Share Posted April 4, 2018 Thanks guys, I found some nice looking feldspar recipes today and will try some substitutes tonight, hopefully fire them this weekend. I'll check out BjarnI thanks Tyler Link to comment Share on other sites More sharing options...
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