Definition
A shift toward a yellow tint in the film or its appearance. It should be distinguished from removable deposits or staining on the surface.
Why it matters
Have a change assessed before using stronger cleaning chemicals. Document the product, exposure and care history. Any warranty against yellowing is product-specific and may have conditions; it is not a universal promise for the PPF category.
Apply the concept
PPF lifespan, inspection and removal
Distinguish service life from warranty and plan what to do when film ages, lifts or is damaged.