The ratio between {HEAD ~ the thickness} of the thin elements and {TAIL ~ thick patterns} is typically of from 1/5 to 1/10 
The ratio between { HEAD ~ the thickness } of the thin elements and { TAIL ~ thick patterns } is typically of from 1/5 to 1/10
OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH