Why the Wrong Flip Can Ruin a Coin (The PVC Nightmare)
That soft, flexible plastic flip protecting your coin is slowly eating it alive. Learn the difference between PVC and Mylar.
Not all plastic is created equal. In the coin world, there are two types: Safe and Deadly.
The Deadly Plastic: PVC
Polyvinyl Chloride (PVC) is used to make plastic soft and flexible. Over time, it releases hydrochloric acid. This acid reacts with the silver/copper in your coin to form a green, sticky slime. Once this happens, the surface of the coin is etched forever. Test: If the flip is soft, pliable, and smells like a new shower curtain... IT IS PVC. THROW IT AWAY.
The Safe Plastic: Mylar / SAFLIP
These are rigid, stiff, and brittle. They contain no chemical softeners. They are chemically inert (archival quality). Test: If the flip creates a sharp crease when folded and feels "crinkly," it is safe.
Action: Go through your collection. Remove every soft flip. Replace with rigid Mylar.
Flip Brand Guide
We list the 3 specific brands of flips (SAFLIP, Cowens, Guardhouse) that are 100% PVC-free and safe.