| Cleaners |
A detergent, alkali, acid or similar
contamination removing material, which is usually water borne. |
| Coal Tar |
A dark brown to black bituminous material
produced by the destructive distillation of coal. |
| Coal Tar Epoxy |
A coating in which the binder or vehicle is a
combination of coal tar and epoxy resins. |
| Coalescence |
The formation of resinous or polymeric
material when water evaporates from an emulsion or a latex system, permitting contact and
fusion of adjacent particles; fusing or flowing together of liquid particles |
| Coat |
The paint applied to a surface in a single
application to form a film when dry. |
| Coating System |
A number of coats separately applied, in a
predetermined order, at suitable intervals to allow for drying and curing, resulting in a
completed job. |
| Cobwebbing |
Premature drying of a coating during spraying
causing a spider web effect. |
| Cohesion |
The forces which bind the particles of a paint
film together into a continuous film. |
| Cold Rolled Steel |
Low carbon, cold-reduced, sheet steel. Differs
from hot rolled steel by the absence of mill scale. |
| Color Fast |
Nonfading. |
| Color Retention |
The ability to retain its original color
during weathering or chemical exposure. |
| Combustible Liquid |
Any liquid having a flash point at or above
100° F (37.8° C) |
| Compatibility |
The ability to mix with or adhere properly to
other coatings without detriment. |
| Conical Mandrel |
An instrument used to evaluate a coating's
resistance to cracking when bent over a specified radius. |
| Copolymer |
Large molecules obtained by simultaneous
polymerization of different monomers, as in vinyl copolymers. |
| Corrosion |
The decay, oxidation or deterioration of a
substance (steel, concrete, and others) due to interaction with the environment. See also
"Rust" |
| Cracking |
Splitting of a paint film usually as a result
of aging. |
| Craters |
The formation of small bowl shape depressions
in paint films. |
| Cross Spraying |
Spraying the first pass in one direction and
the second at a right angle to the first, providing more even film distribution. |
| Crosslinking |
The setting up of chemical links between
molecular chains to form a three dimensional network of connected molecules. |
| Curing Agent |
A hardener or activator added to a synthetic
resin to develop the proper film forming properties. |
| Curtains |
Long horizontal runs in a coating film that
occur on vertical surfaces when a coating is applied too heavily. |
| Degreaser |
A chemical solution or compound designed to
remove grease, oils and similar contaminants. |
| Deionized Water |
Water which has been purified to remove
mineral salts. |
| Delamination |
The separation between layers of coats due to
very poor adhesion. |
| Density |
Mass per unit volume, usually expressed as
grams per milliliter or pounds per gallon. |
| Descaling |
The removal of mill scale or rust from steel
by mechanical means, sometimes assisted by flame cleaning. |
| Dew Point |
The temperature of a surface, at a given
ambient temperature and relative humidity, at which condensation of moisture will occur. |
| DFT |
Dry film thickness. |
| Diluent |
A portion of the volatile components of a
coating which is not a true solvent and has minimal affect on the viscosity. |
| Dispersion |
The suspension of tiny particles, usually
pigments, in a liquid, usually resin. |
| Distilled Water |
Water which has been purified by vaporizing
the liquid and collecting the vapor which is then condensed back to a liquid having, in
the process, removed the contaminants. |
| Drier |
A chemical which promotes oxidation and
subsequent drying of a paint film. Primarily used in oil base paints. |
| Dry Fall |
A coating which is designed to dry rapidly so
that the overspray can be easily removed from the surfaces below. |
| Dry Spray |
Overspray or bounce back producing a sandy
finish due to the sprayed particles having partially dried before reaching the surface. |
| Dry Time |
Time allotted for an applied coating film to
reach a set stage of cure or hardness. |
| Dry to Handle |
The degree of cure at which a film will resist
deformation due to handling. |
| Dry to Recoat |
The time required for a cured film to dry
prior to the application of a second coat. |
| Dry to Tack Free |
A stage at which a coating film will form a
skin to which dust will not adhere. |
| Dry to Touch |
The state of dry at which a coating film will
not transfer onto an item touched lightly against it. |
| Drying Oil |
An oil having the property of hardening by
oxidation to a tough film when exposed to air in the form a thin film. |
| Dulling |
A loss of gloss or sheen. |
| Effervescence |
An effect in the film caused by rapid solvent
release. This "boiling" of solvent causes a pinholed or cratered appearance
reducing gloss. |
