ULTRAVIOLET RESISTANCE:
Tapes resistance to degradation by ultraviolet light, such as found in sunlight.

UNWIND:
Removing or unwinding tape from a roll. Characteristics or unwind are influenced by the adhesion of the tape to its own backing.

UNWIND ADHESION:
Force required to remove tape from a roll under prescribed conditions.

UPVC:
Unplasticised Polyvinylchloride, a rigid film used in packaged applications, and as a transparent tape in stationery uses.