The different colors observed on Silcosteel treated parts indicate different layer thicknesses. A blue color corresponds to a 300 to 450 Angstrom layer while a rainbow color indicates a coating of at least 1200 Angstroms.
Colors associated with layer thickness are:

Thick depositions used in Silcosteel-CR processes are 5µm to 20µm deep and have a silver/metallic grey appearance. The photos below show colors created by Sulfinert (left) and Silcosteel-CR (right) deposition.


