Both the kind and amount of {TAIL ~ the cross} linking {HEAD ~ substance} added and the energy input of the subsequent irradiation then control the hardness of the material of the second region 
Both the kind and amount of { TAIL ~ the cross } linking { HEAD ~ substance } added and the energy input of the subsequent irradiation then control the hardness of the material of the second region
OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH 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