AUTOBODY REPAIR DEFINITIONS

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NITROCELLULOSE LACQUER:

• Lacquer paint whose resin is formed with cellulose, a natural resin made from cotton.

NON-PHOTOCHEMICALLY REACTIVE:

• Solvents which do not react with sunlight to cause ozone or smog.

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O.E.M.:

• Original equipment manufacturer.

OPAQUE:

• A finish that is not transparent. Light cannot be seen through it and does not allow what is underneath to show through.

ORANGE PEEL:

• Texture in a paint film that resembles the peel of an orange. Caused by improper reduction or application.

OSHA (OCCUPATIONAL SAFETY AND HEALTH ADMINISTRATION):

• A federal agency which sets safety and health regulations for most of the U.S. industries and businesses.

OVERLAP:

• Placing one coat of paint alongside another, one partly extending over the other.

OVER SPRAY:

• Paint which during application will stick to adjacent panels not being painted.

OXIDATION:

• Chemical reaction between oxygen and another substance, causing paint film curing, paint film failure or metal rusting.

OZONE:

• A triatomic very reactive form of oxygen that is a bluish, irritating gas of pungent odor. Formed naturally in the atmosphere by a photochemical reaction and is a major air pollutant in the lower atmosphere but a beneficial component of the upper atmosphere.

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PAINT SETTLING:

• The dropping or settling of the solids in a reduced or unreduced paint to the bottom of paint gun or can.

PAINTER VARIABLES:

• Painter can control range of reduction, air pressure, speed of travel, flash time, etc.

PANEL REPAIR:

• Refinishing of a complete panel.

PEELING:

• Loss of adhesion between one coat of paint to succeeding coats or coatings.

PHOTOCHEMICALLY REACTIVE:

• Organic solvents that react with ultra violet light to form oxidants such as ozone and smog.

PIGMENT:

• An insoluble finely ground powder, either natural, synthetic, inorganic or organic. It provides color, hardness, durability, hiding and corrosion resistance to paint.

PIN-HOLE:

• Paint imperfection resembling a hole about the size of the head of a straight pin. Caused by solvent entrapment or air bubbles.

PIN-HOLE:

• Paint imperfection resembling a hole about the size of the head of a straight pin. Caused by solvent entrapment or air bubbles.

POTLIFE:

• The amount of time a mixed material is usable.

PRESSURE POT:

• A sealed paint cup with a paint gun which puts a measured amount of air pressure into it. This then forces the paint to the gun for atomization.

PRIMARY COLOR:

• Red, yellow and blue. These colors resemble no other color and cannot be formed by mixtures of any other colors.

PRIMER:

• The coating applied to a properly pre- pared substrate to give corrosion resistance, adhesion and chemical resistance.

PRIMER-SEALER:

• An undercoat used to improve adhesion and color holdout with mini- mum filling properties.

PRIMER-SURFACER:

• Undercoat used to fill imperfections, with primer qualities and maximum filling properties. Must be sanded.

PUCKERED:

• Small wrinkles or buckles caused by a non-compatibility of additives.

PUTTY (SPOT):

• Materials used to fill imperfections in a substrate. Composed of a lacquer or polyester resin. Applied with a squeegee and sanded smooth.

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RANDOM ORIENTATION:

• The dispersion of metallic or mica flakes with no specific pattern.

REDUCER:

• A solvent used to lower the viscosity of an enamel or urethane.

REFINISH:

• The act of replacing or repairing a painted surface, usually undercoat and topcoat.

REFLOW:

• Adding heat to such a degree as to cause the paint to melt and become a liquid.

RESIN:

• A clear or semi-clear part of a paint film which gives solids or film build. Resin gives the finish shine, gloss, durability, adhesion, handling and drying characteristics.

RETARDER:

• Slowest evaporating solvent.

RUN:

• Excessive amount of coating failing to adhere uniformly over the surface, thus flowing unevenly in a small area.

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