I

Immiscible
Incapable of being blended.

Impact Fusion
The tendency of finely divided powder to combine with other particles in the application equipment creating a hard crust.

Incompatibility
Inability to mix two powders without getting a different surface appearance, such as gloss reduction or craters.

Infrared (IR)
Light Energy used in short wave or medium wave forms to initiate cure in a powder coating.

Infrared Cure
A method of curing powder using direct exposure to light energy.

Inhibitor Pigments
Pigments that retard to the corrosion process in the substrate.

Inorganic
A substance that is not formed by natural growth.

Insoluble
A substance that will not dissolve in water or solvent.

Integral Charging
A powder gun that has a low voltage single supply to it, and steps up the current to high voltage via a cascade multiplier located in the gun barrel.

Intercoat Adhesion
The ability of a powder coating to adhere to a previously applied film.

Iron Phosphating Conversion Coating
Chemical deposition on steel for promoting corrosion protection and improving adhesion.

Isocyanate Resin Urethane Resins
Isocyanate curing agents which when heated or reacted with hydroxy functional polymers giving urethane coatings.