By contacting the permeated wicking material with the substrate, {HEAD ~ controlled amounts} of catalyst solution may be applied to {TAIL ~ delimited areas} of the substrate 
applied to
By contacting the permeated wicking material with the substrate , { HEAD ~ controlled amounts } of catalyst solution may be applied to { TAIL ~ delimited areas } of the substrate
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH