{TAIL ~ Useful catalytic inks} have {HEAD ~ low viscosity}, e.g. about 20 600 centipoises , preferably 50 500 cp 
{ TAIL ~ Useful catalytic inks } have { HEAD ~ low viscosity } , e.g. about 20 600 centipoises , preferably 50 500 cp
TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH