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Lesson Plans


Re: 60 kids down my throat!

[ Thread ][ Subject ][ Author ][ Date ]
Rosa Juliusdottir (rojul)
Thu, 12 Nov 1998 19:14:44 -0500


Hi, it is probably that the clay was not dry enough. I used to have similar
problems, and I have a similar kind of kiln. But since I started drying the
clay really long, like at least 10 says to two weeks I have had no problems
with cracking.
Best regards from the far north, Rosa

>Help! I've just ruined 60 twelve year olds day!
>
>After firing 60 pinch pots yesterday, I opened the kiln to find small
>pieces of shattered clay. Only 2-3 pieces survived without a crack. I
>had been careful to explain to them to wedge the clay for air bubbles.
>We let it get bone dry and I loaded it into the kiln. This is the 2nd
>time I've fired greenware but I following the same directions I did the
>first time which were left by the previous art teacher. I left the lid
>cracked open the first hour set on 1 (cone 5). Then I raised the temp.
>3, 6, 8, hi, every hour.
>
>This is an old kiln and no manual was left for it. I know I could call
>the company and get another manual. I'll work on that.
>
>Can any of you help me? I probably sound like an idiot to any of you
>who know what you are doing. I know its probably the temp. that I'm
>firing it at.
>
>Back to breaking hearts of babes,
>Michelle H. Harrell
>mmhar
>North Garner Middle School
>Garner, North Carolina
>
> * ~ "The artist must train not only his eye but also his soul."
> ^
> \_/ -Wassily Kandinsky
>
>
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