A process 4, wherein the amount of the metal element selected in the Periodic Table used in {TAIL ~ the contact treatment} is in the range of from 0.001 to 0.5 part by weight per part of {HEAD ~ platinum} or palladium 
A process 4 , wherein the amount of the metal element selected in the Periodic Table used in { TAIL ~ the contact treatment } is in the range of from 0.001 to 0.5 part by weight per part of { HEAD ~ platinum } or palladium
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH