What gives sliced ham that iridescent sheen?
The shiny, greenish, rainbow like color on sliced ham is a sign of oxidation that occurs when the meat is exposed to the metal on a knife or slicer. The nitrate-modified iron content of the meat undergoes a chemical change that alters the hams pigmentation. This effect can also be seen in sliced beef, such as roast beef. It is not an indication of spoilage.
