IMPACT RESISTANCE:
Tapes resistance to a tape breaking under shock load.

IMPACT STRENGTH:
Referring to a tapes strength when a force is applied suddenly to the tape. Differing from tensile in that tensile strength is measured at a slower rate with direct force at 180 degrees.

IMPREGNATION:
Referring to the treatment of a backing. Individual fibers are bonded together to improve on physical and chemical characteristics. These impregnates prevent de-lamination, increase moisture and solvent resistance.

IMPRINTING:
Referring to the actual mechanical impression of a tape pattern into the surface to the tape has been applied.

INHIBITOR:
A substance that slows down chemical reactions.

INORGANIC:
Chemical substances that are not based on carbon (carbonates, carbon oxides and carbides are exceptions, being considered inorganic).

INSULATION:
Material that will inhibit the flow of electrical current.

INSULATION RESISTANCE:
Tapes ability to resist current flow along its surface under specific conditions.