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#31
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Chemistry basics for potters?
Oops - meant to say - I would only do that as a test to try to track down
what is going on. Go to clayart (www.potters.org) and do a search for blistering or blisters in Title and Body - many ideas are there. "Bubbles_" wrote in message ... "DKat" wrote in message ... Put a scatch in the glaze with your nail. Also your glazes will thicken over time and need to be thinned. How much glaze do you have and do you have a scale? I do have to add a little water to them now and then, for sure. I have close to 40 high-fire glazes and around 12 low-fire glazes - plus some underglazes colors. I have an old kitchen scale that I use to weigh my clay before I dump it on the wheel. It weighs up to 2 kilos. Happy weekend! Marianne |
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#32
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Chemistry basics for potters?
"DKat" wrote in message ... You so DON'T sound like the amateur you pretend to be... Donna LOL! Thank you! I AM an amateur, though. I have sold only one piece (at a students' exhibition my teacher held), although I do hope to start selling some stuff on Ebay soon. I have only been working with clay seriously for about 5 years. Compared to you guys, I am a baby. And I so greatly appreciate all the input I get from y'all! Marianne |
#33
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Chemistry basics for potters?
"DKat" wrote in message ... Oops - meant to say - I would only do that as a test to try to track down what is going on. Go to clayart (www.potters.org) and do a search for blistering or blisters in Title and Body - many ideas are there. Wow - almost too many ideas! Hehe! The consensus seems to be that iron can be a problem. I don't think my clay has iron in it, as it is grey unfired and almost white fired. BUT the glaze that is my biggest problem is red when unfired, so I am suspecting it might have iron in it. Possibly a sollution would be to ignore the extra power required and leave the bottom and top (lid) holes open through the whole firing in order to provide enough oxygen? Marianne |
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