| Primer |
The first coat of paint applied to a surface,
formulated to have good bonding, wetting and inhibiting properties. |
| Profile |
The term used to describe the anchor pattern
of a surface produced by sandblasting, acid etching or similar method. |
| PYROCRETE® |
PYROCRETE is a trade name for a group of
Carboline Company fireproofing materials. |
| Pyrometer |
An instrument used to measure the temperature
of a surface. |
| QUV |
An accelerated testing device designed to
evaluate the fading properties of a coating by exposure to high intensity, ultraviolet
light. |
| Reducer |
Commonly known as thinner. |
| Reflectance |
The ratio of the intensity of reflected light
to that of incidental light. |
| Relative Humidity |
The ratio, expressed as a percent, of the
quality of water vapor actually present in the air to the greatest amount possible at a
given temperature. |
| Resin |
A group of organic materials, either natural
or synthetic, which can be molded or dissolved. |
| Rheology |
The science characterizing fluid deformation
or flow. |
| Roller |
A cylinder covered with lamb's wool, felt,
foamed plastics or other materials used for applying paint. |
| Runs |
Sagging and curtaining of a coating or paint
film, usually caused by improper thinning, excessive film build or poor application
techniques. |
| Rust |
The corrosion of steel or iron is an
electrochemical phenomena wherein the base metal reverses to a lower, more stable energy
state. If the corrosive environment is water or brine, then the corrosion product formed
is commonly know as rust. In the case of other chemicals, such as alkalies or acids, other
combinations of iron salts are formed as part of the corrosion product. The
electrochemical corrosion process may be retarded or stopped by the proper use of
protective coatings. One preventive method provides an insulation barrier between the
corrosive environment and the metallic substrate. This type of protection is exemplified
by the painting of structural steel with organic coatings such as epoxies, alkyds and
acrylics. An even more effective method is to use a more reactive metal such as zinc. A
conductive zinc-filled coating protects the metal by galvanic protection. The zinc
sacrifices itself and corrodes in preference to the steel. |
| RUSTBOND |
RUSTBOND is a trade name for a group of
Carboline Company products typically used in maintanance painting and overcoating of lead
based coatings. |
| Sag Resistance |
The ability of a paint to be applied at proper
film thicknesses without sagging. |
| Sagging |
The downward movement of a paint film on a
vertical surface, between the time of application and drying, resulting in an uneven
coating having a thick lower edge. |
| Salt Atmosphere |
A moist, heavily ladened air with a high
chloride concentration; used as a test for accelerated corrosion evaluations and also
present near sea coast areas. |
| Salt Fog Test |
A cabinet designed to accelerate the corrosion
process in evaluating coatings; combines 100% humidity with a 5% salt concentration at
100° F in an enclosed cabinet. |
| SANITILE® |
SANITILE is a trade name for a group of
Carboline Company products typically used as heavy duty wall, ceiling and equipment
coatings in food processing and institutional facilities. |
| Saponification |
The alkaline hydrolysis of fats whereby a soap
is formed; typical reaction between alkyds and galvanized metals resulting in peeling. |
| Satin Finish |
A descriptive term generally referenced to
paints with a 60° gloss reading between 10 and 40. |
| Sealer |
A coating used on absorbent surfaces prior to
painting. |
| Settling |
The sinking of pigments, extenders or other
solid matter in a paint, on standing in a container, with a consequent accumulation on the
bottom of the can. |
| Shade |
A term employed to describe a particular hue
or tone. |
| Shelf Life |
The maximum time interval in which a material
may be kept in a usable condition during storage. |
| Shop Primer |
An inexpensive, rust inhibiting primer
designed to protect steel from general weathering immediately after fabrication and before
final coating. |
| Shot Blasting |
Abrasive blasting with round iron shot, or any
material which retains its spherical shape, for peening purposes. |
| Silica Sand |
Clean sand made up of sharp silica particles,
not containing dirt or clay, used for abrasive blast cleaning. |
| Silicone Resins |
Resins based on silicone instead of carbon,
generally used for their outstanding heat resistance and water repellency. |
| Skinning |
The formation of a solid membrane on the top
of a liquid, caused by partial curing or drying of the coating during storage. |
| Solids by Volume |
The percentage of the total volume occupied by
nonvolatile compounds. |
| Solvent |
A liquid in which another substance may be
dissolved. |
| Solvent Entrapment |
The encapsulation of solvent within a cured
paint film due to improper drying conditions; results in a non-continuous film. |
| Sound Rusted Substrate |
A rusted substrate cleaned of all loose rust
and other loose materials, but not cleaned to bare metal. |
| Specification |
A set of instructions detailing the plan for
coating of a project; a list of criteria for a coating. |
| Spray Head |
The combination of needle, tip and air cap. |
