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