The invention is based on the discovery that if an initial thin layer is deposited from a dilute Cr thiocyanate bath, {HEAD ~ subsequent thick deposits} from {TAIL ~ a more concentrated, higher rate Cr thiocyanate bath} have much better properties of cohesion and surface smoothness 
The invention is based on the discovery that if an initial thin layer is deposited from a dilute Cr thiocyanate bath , { HEAD ~ subsequent thick deposits } from { TAIL ~ a more concentrated , higher rate Cr thiocyanate bath } have much better properties of cohesion and surface smoothness
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH