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Copper inlays
On Fri, 07 Mar 2008 19:06:41 +0000, Eddie Daughton
wrote: Bob Masta wrote: snip With the local clays around here (Ann Arbor, Michigan, USA) I find that they would make decent low-fire bodies, except they tend to be full of lime bits that cause the infamous "lime pops" after firing. They can be sieved out, but that's a lot of work for body clay, which you use a lot of. On the other hand, they make *wonderful* brown glazes at cone 6, and sieving that smaller amount is no big deal... especially since I tend to sieve most glazes anyway. O' course you could always once fire it (if it's got lime) get it above cone 6 and the lime melts and forms part of the body, that's why Stoneware (once fired) never suffers from the dreaded white pits... Hugs Eddie The local clay is like Albany Slip or any other low-fire clay: It is completely melted at cone 6. So yes, the lime is part of the body, but the body is a puddle! But it's probably true that I could use it as a glaze without sieving out the lime, and the lime would simply add to the glaze. However, the sieve also removes sand and other inclusions that don't melt as readily and leave a gritty glaze surface. Best regards, Bob Masta DAQARTA v3.50 Data AcQuisition And Real-Time Analysis www.daqarta.com Scope, Spectrum, Spectrogram, FREE Signal Generator Science with your sound card! |
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