The kiln is heated further to {HEAD ~ a temperature} which may be above {TAIL ~ the noted upper limit}, to obtain the maturing point of the clay and glazes 
above
The kiln is heated further to { HEAD ~ a temperature } which may be above { TAIL ~ the noted upper limit } , to obtain the maturing point of the clay and glazes
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH