2-piper is correct, cyanide case colors are in fact real. Cyanide case coloring produces very "unique" colors and can usually be instantly identified from a traditional bone charcoal case color job because of the way the cyanide process is performed. When the actions are dipped in the cyanide they are usually put in very carefully, causing the infamous "tiger stripes". A traditional bone and charcoal color case creates different coloration because the action falls into the aerated quench randomly. The bubbles in the quench cause the action to be unevenly cooled, sealing in the carbon absorption in random areas and creating unpredictable and beautiful colors. Colors differ between the two processes simply because the two processes are not the same. Traditional bone charcoal case hardening creates certain colors because of the calcium phosphate in the bone. Im not exactly sure why or how the cyanide process produces colors. Im sure someone here can explain it in detail.
Obvious cyanide colors
http://www.pugsguns.com/content/pictures/07112M.jpgTraditional (original) Process
http://www.pugsguns.com/content/pictures/07332M.jpg
