{HEAD ~ 1.70 wt %} of {TAIL ~ 2,4,6 trimethylbenzoyldiphenylphosphine oxide type photoinitiator} 
{ HEAD ~ 1.70 wt % } of { TAIL ~ 2,4,6 trimethylbenzoyldiphenylphosphine oxide type photoinitiator }
HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL