{HEAD ~ Optimum IR element settings} are {TAIL ~ a compromise} between heating time, through thickness temperature distribution and polymer degradation 
are
{ HEAD ~ Optimum IR element settings } are { TAIL ~ a compromise } between heating time , through thickness temperature distribution and polymer degradation
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH