| Grit |
An abrasive blasting media obtained from slag
and various other materials. |
| Grit Blasting |
Abrasive blasting using grit as the blasting
media. |
| Hardener |
An activator curing agent, catalyst or cross
linking agent. |
| Hardness |
The degree to which a material will withstand
pressure without deformation or scratching. |
| Hiding |
The ability of a coating to obscure the
surface to which it is applied. |
| High Build |
A term referring to a paint film which can
produce a thick film in a single coat. |
| Holiday |
Any discontinuity, bare or thin spot in a
painted area. |
| Hot Rolled Steel |
Steel which has been formed while still hot,
generally characterized by the presence of bluish-black mill scale. |
| Hydrocarbon |
Extracts from petroleum such as gasoline,
lubricating oils, solvents, etc. |
| Hydrophilic |
A substance which absorbs or has an affinity
for water loving. |
| Hydrophobic |
A substance which does not absorb or exhibit
an affinity for water. |
| Immersion |
Referring to an environment which is
continuously submerged in a liquid, often water. |
| Impact Resistance |
The ability to resist deformation or cracking
due to a forceful blow. |
| Incompatibility |
Unsuitable for use together because of
undesirable chemical or physical effects. |
| Induction Time |
The period of time between mixing of two
component products and the moment they can be used. |
| Inert Pigment |
A non-reactive pigment, filler or extender. |
| Inhibitive Pigment |
A pigment which assists in the prevention of
the corrosion process. |
| Inorganic |
The designation of compounds that do not
contain carbon. |
| Inorganic Zinc |
A coating based on a silicate resin and
pigmented with metallic zinc which has excellent resistance to organic solvents and
general weathering. |
| Intercoat Adhesion |
The adhesion between successive coats of
paint. |
| Intercoat Contamination |
The presence of foreign matter such as dust or
dirt between successive coats of paint. |
| Internal Mix |
A spray gun in which the fluid and air are
combined before leaving the gun. |
| Intumescent Coating |
A fire retardant cooling which, when heated,
produces nonflammable gasses which are trapped by the film, converting it to a foam,
thereby insulating the substrate. |
| Ion |
An atom or group of atoms possessing a
positive or negative electric charge as a result of having lost or gained an electron. |
| Iron Oxide |
An oxide of iron. The natural occurring state
of steel. |
| Isopropyl Alcohol (IPA) |
A volatile, flammable liquid used as a solvent
commonly known as rubbing alcohol. |
| Ketone |
An organic compound with a carbonyl group
attached to two carbon atoms. Usually indicates a strong, fast evaporating solvent. |
| Krebs Units (KU) |
An arbitrary unit of viscosity for a Stormer
viscosity instrument. |
| Lacquer |
A coating comprised of a synthetic film
forming material which is dissolved in organic solvents and dries by solvent evaporation. |
| Lacquer Thinner |
Commonly used term used to describe a solvent
blend of ethyl alcohol, ethyl acetate and toluene. |
| Laitance |
An accumulation of fine particles, loosely
bonded, on the surface of fresh concrete, caused by the upward movement of water. |
| Latex |
A stable dispersion of a polymer substance in
an aqueous medium; a common term for water reducible coatings. |
| Lead-Free |
Contains, by weight, less than 0.5% lead for
industrial products and less than 0.6% lead in consumer products. |
| Leafing |
The orientation of pigment flakes in a
horizontal plane, usually aluminum. |
| Lifting |
Softening and raising or wrinkling of a
previous coat by the application of an additional coat; often caused by coatings
containing strong solvents. |
| Mastic |
A term used to describe a heavy bodied
coating. See "Carbomastic" and "Bitumastic" |
| Metalizing |
A method of applying atomized, molten metal
such as zinc and aluminum to a surface. |
| Methyl Ethyl Ketone (MEK) |
A low boiling, highly volatile flammable
solvent with extremely good solubility for most vinyls, urethanes and other coatings. |
| Methyl Isobutyl Ketone
(MIBK) |
A medium boiling solvent commonly used in
vinyls. |
| Micron |
A micrometer or one millionth of a meter. |
| MIL |
One one-thousandth of an inch; 0.0001 inches.
Commonly used to denote coating thickness. |
| Mildew |
A superficial growth of living organic matter
produced by fungi in the presence of moisture; results in discoloration and decomposition
of the surface. |
| Mill Scale |
A layer of iron oxide formed on the surface of
steel plates during hot rolling; bluish in appearance. |
| Mineral Spirits |
A refined petroleum distillate having a low
aromatic hydrocarbon content and low solubility; suitable for thinning of alkyd coatings. |
| Miscible |
Capable of mixing or blending uniformly. |
