Upon attainment of {TAIL ~ the desired temperature level}, {HEAD ~ a selected quantity} of the reducing agent is introduced into the chamber for producing a reducing atmosphere during the maturing of the ceramic ware 
Upon attainment of { TAIL ~ the desired temperature level } , { HEAD ~ a selected quantity } of the reducing agent is introduced into the chamber for producing a reducing atmosphere during the maturing of the ceramic ware
OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH