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s crack update. another twist in the tale.

updated sat 3 jun 00

 

iandol on fri 2 jun 00


Thanks to Sheron, Cat and Joyce for their contributions. I agree that =
what they are doing seems to be par for the course on three continents. =
Those notes about getting rid of the water and even thickness at wall =
and base to get uniform drying seem most important.

I saw the Isaac Button film. For the large basins he made the base as a =
separate pad of clay, beaten down. Then the pug was slapped on and coned =
down before the body was opened up. Interesting point was, he put a =
Victoria Penny on the flat base before placing the pug. When he opened =
the clay, the penny marked the spot where he had to stop the =
penetration. The coin was rescued for the next pot. Has anyone ever =
tried this?

Now the direction of wedging or pug milling being important is an =
interesting one. I wonder if the intention is to unwind the spiral twist =
or to tighten it up. Some people say that is nonsense and the thing to =
do is to put the clay on the wheel head so that it is cross ways. I keep =
an open mind. I believe you cannot compress plastic clay. You can =
distort the flock structure, an entity which seems to be ignored when =
plasticity is discussed.

And thanks to Elizabeth=92s SO. Now, if his theory about micro-magnetic =
fields has any credence, Sir may have to get the old magnetometer out =
and do a few tests while you, Elizabeth, are throwing. I always say that =
we should not ignore the phase of the Moon either. After all, if an =
object that far away can lift so much water so high twice a day it must =
cause a rush of blood. Sweeps like a tidal wave through the potting =
population. Are s-crack more prevalent :^)at spring tides?