O

OCF

ocSPF

OFF-GASSING

OFF-RATIO FOAM

ONE-COMPONENT FOAM

OPEN-CELL SPF

OPTICAL COMPARATOR

ORANGE PEEL SURFACE TEXTURE

ORGANIC

OUTGASSING

OVERSPRAY

OVERSPRAY SURFACE TEXTURE

OCF: One-Component Foam. (See SINGLE-COMPONENT FOAM.)

ocSPF: Open-cell SPF. (See LOW-DENSITY SPF INSULATION.)

OFF-GASSING: See OUTGASSING.

OFF-RATIO FOAM: An off-ratio foam is caused by a deficiency of one of the component chemicals (A- or B-side) during application. The reaction of an off-ratio foam is readily visible to the trained SPF applicator. Off-ratio foam will negatively affect SPF yield, performance, and worker safety.

ONE-COMPONENT FOAM: See SINGLE-COMPONENT FOAM.

OPEN-CELL SPF: See LOW-DENSITY SPF INSULATION.

OPTICAL COMPARATOR: An eyepiece with magnification ranging from 4–12 power, with a scale used for measuring thickness.

ORANGE PEEL SURFACE TEXTURE: The surface texture of SPF, which exhibits a fine granular texture and is compared to the exterior skin of an orange. This surface is considered acceptable for receiving a protective coating. This surface requires at least 10% additional coating material to the theoretical amount. (See SPFA-145, “Surface Texture of Spray Polyurethane Foam.”)

ORGANIC: Compounds containing carbon. 

ORIFICE: An opening or aperture. The opening in the tip of a spray gun. 

OUTGASSING: The slow release of a gas that was trapped, frozen, absorbed, or adsorbed in some material. Sometimes called “off-gassing,” particularly when in reference to indoor air quality.

OVERSPRAY: (1) Airborne spray loss of polyurethane foam or coatings. (2) Undesirable depositions of airborne spray loss.