different angles. This process separates the light into different colors, creating the rainbow-like appearance you see.
It’s similar to the way:
Soap bubbles display rainbow colors
Oil creates colorful patterns on water
A CD reflects multiple colors when held under light
In other words, it’s physics—not spoilage.
Which Meats Show the Rainbow Effect?
The phenomenon is most commonly seen in:
Deli ham
Roast beef
Corned beef
Turkey
Smoked meats
Certain types of fish
The effect tends to be more noticeable when the meat has been sliced very thinly and viewed
