{HEAD ~ A photosensitive resin composition} 3 wherein {TAIL ~ X} is absent, j/j+k is from 0.26 to 0.65, t is 1, n is an integer of 100 to 130, Z is sodium, and the aromatic ketone is Michlers ketone 
wherein
{ HEAD ~ A photosensitive resin composition } 3 wherein { TAIL ~ X } is absent , j / j+k is from 0.26 to 0.65 , t is 1 , n is an integer of 100 to 130 , Z is sodium , and the aromatic ketone is Michlers ketone
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH