{HEAD ~ The mean particle size} of carbon black is preferably 0.01 to 0.1 μm also for formation of {TAIL ~ the favorable electroconductive network} 
{ HEAD ~ The mean particle size } of carbon black is preferably 0.01 to 0.1 μm also for formation of { TAIL ~ the favorable electroconductive network }
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL