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Lesson Plans


Re: clay question

[ Thread ][ Subject ][ Author ][ Date ]
Linda Kelty (lckelty)
Tue, 5 Oct 1999 21:45:19 -0400


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Donna, I never had a problem with it cracking. The slabs were the same =
moisture level and stored in a bag between classes. I think the =
difference is that putting a wet slip on a drier piece will cause =
cracking because of the difference in shrinkage rates. We used engobes =
over clay bodies when I was in high school and it was no problem either. =
I firmly believe that we learn by doing. If curious, try it. Some of =
our best inventions have resulted from this approach and it's like a =
mini adventure in learning for those of us "giving it a shot".

If you water down clay to make slip, and put that slip on the outside =
of a piece, won't it crack??? Is it true that "store bought" slips have =
an agent in them to stop the cracking???=20
donna=20

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Donna, I never = had a=20 problem with it cracking.  The slabs were the same moisture level = and=20 stored in a bag between classes.  I think the difference is that = putting a=20 wet slip on a drier piece will cause cracking because of the difference = in=20 shrinkage rates.  We used engobes over clay bodies when I was in = high=20 school and it was no problem either.  I firmly believe that we = learn by=20 doing.  If curious, try it.  Some of our best inventions have = resulted=20 from this approach and it's like a mini adventure in learning for those = of us=20 "giving it a shot".

 
 If you = water down clay=20 to make slip, and put that slip on the outside of a piece, won't = it=20 crack??? Is it true that  "store bought" slips have an = agent in=20 them to stop the cracking???
donna ------=_NextPart_000_0022_01BF0F7A.EB4ECCE0--