In addition to mica to control heat, some potters "stuccoed" the exterior  
of pots with clay to control heat. I have examined stuccoed pottery, but 
really  do not understand how this helps in heating. Any ideas?
 
Ron May
Legacy 106, Inc.
 
 
In a message dated 7/3/2009 3:14:07 A.M. Pacific Daylight Time,  
[log in to unmask] writes:

Mica  could enter the pot as temper (with quartz sand) as micaceous 
sandstones  are not uncommon at least in Europe.

I came across an interesting  example recently from a kiln in Swansea, S 
Wales. it produced pots which  appear t be late C15/early c16 in date 
paralleling similar vessels from  the Cotswolds (Minety area) suggesting 
a source for the potter. The  Cotswold pots are tempered with oolitic 
limestone but the Swansea pots  appear to have been tempered with an 
oolitic sand probably from a beach  along the nearby Gower peninsula. The 
pots re unknown from consumer  deposits so it looks as if the kiln was 
short-lived- possibly not much pot  being used in this period which seems 
to be dominated by English and  Continental  imports.

paul


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