Sentence:  <WSD>Bonfiring</WSD> has a very direct contact between the pottery and the flame. Firing time is usually quite short and the pots are carefully supervised through the process. <WSD>Bonfiring</WSD>, in general, does not create the same amount of wasters as kiln firing ... 
Meaning of the word marked with <WSD> tags:  To fire (pottery) using a bonfire.