Jack Phillips on thu 4 jun 98
At 08:43 AM 6/3/98 EDT, Ron Roy wrote:
>----------------------------Original message----------------------------
>Hey Cookie,
>
>You are going to get a lot of answers on this one - and they are all gonna
>say - you can't raku fire wet pots - period. They have to be perfectly dry
>- I can remember my raku days - about 25 years ago - having to leave ware
>on a hot kiln for hours to make sure they were sans H2O.
>
>I am assuming they were bisqued - thats elementary.
>At 08:43 AM 6/3/98 EDT, Ron Roy wrote:
>----------------------------Original message----------------------------
Wait a minute! Are we missing something? She clearly stated (Copy and paste)
"Around 1790-1800 was when we heard the "boom"
Something else is going on here besides moisture. I have fired thousands of
raku pieces imediately after glazing them, and I know one thing, moisture
is not a problem by the time you get to 1800 f. But it would be good if you
would tell us about your clay body and your fireing schedule. In fact, I
have never heard of a pot "exploding" at ^06 just before you remove it from
the kiln, (not having exposed it to open air.) -This is intriguing. Now I
need to go back through the archives. Something about a sudden expantion at
1800 f. Who wrote the post about the sudden at 1800,? but that was during
the "refire" thread... Hmm..
Stonart Ceramic art
Jack Phillips
>>----------------------------Original message----------------------------
>>Greetings Clayarters! I have a question/problem for you rakuers out
>>there. A while back while giving a demo/workshop here at school, a large
>>quantity of our raku pieces blew up while firing. We take the kiln to
>>1850 F or until the glaze reaches maturity. The pieces were average size
>>bowls, some boxes and some smallish plaques. Around 1790-1800 was when we
>>heard the "boom" explosions, one after another,
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Jack & Cindy Phillips
STONART Ceramic art
Portland, Or.
503-255-3003
http://www.worldstar.com/~stonart/
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