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Lesson Plans

Drape mold

[ Thread ][ Subject ][ Author ][ Date ]
One of the Colmans (colmans1)
Sat, 16 Jan 1999 12:55:58 -0500

I have been experimenting with drape molds in my high school ceramics class.
I made solid molds by filling plastic bowls with plaster. The students
invert these and build a pot on the outside. They have been using
embellished coil designs instead of a solid slab of clay to cover the mold.
The problem is that by the time they finish ( it usually takes 3 to 4 class
periods) it is very difficult to remove the pot. The pot seems to really
stick to the mold when the clay is still fairly moist. If we wait until it
is closer to leather hard, it tends to crack. I realize that the clay is
shrinking and that is why it's cracking, but I don't know when the optimum
time is to remove the pot. Are the kids presing onto the mold too tightly
when they construct their coil designs? Also, has anyone found any
interesting containers to make molds out of that are a bit different from
the traditional bowl? I'd like to be able to do platters etc. Thanks! Marian

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