. . . . . . . . "Subsequently, the second layer, which primarily comprises various combinations of cobalt, manganese, beryllium, strontium, rhodium, copper, ,??-titanium, potassium, boron, calcium, a metal such as magnesium or aluminum and the dichromate radical, builds on top of the first layer and actually forms a film having a thickness of 0.008 mm to 0.012 mm over the surface of the substrate." . . . .