Loss of gloss or sheen.
Inert inorganic powder used as a filling phase in industrial paints and in some architectural
materials. Provides extra body or hiding power. May be added in relatively large proportions
to improve properties and/or decrease cost.
See Extender for architectural coatings
Layer of coating.
Formation by drying of a solid and coherent polymer-matrix film from a fluid paint applied
to a substrate. Drying can be physical drying (for coatings based on thermoplastic binders),
chemical drying (for coatings based on reactive binders), or both.
Continuity of a coating free of defects.
Film thickness gauge
Equipment for measuring either wet or dry film thickness.
Coating defect: circular voids or separation in the coating. Fish-eyes can be caused by
oily spots or silicone particles and/or by air-borne droplets
that are deposited on the painted surface.
Additive which inhibits the initiation and/or spread of flame or smoke by inhibiting the
combustion reaction in the flame, or by other mechanisms such as suppression of the oxygen
flow and the build-up of protecting layers.
Syn. Fire retardant, Smoke suppressant
Substance easily ignited in the presence of a flame; any liquid having a flash
point below 100°F (37.8°C).
Lowest temperature of a liquid at which sufficient vapor is provided to form
an ignitable mixture when mixed with air. Flash point is tested on a "Setaflash
Tester" or a "Tag Closed Cup Flash Tester" (TCC).
Time which must be allowed after the application of a coating before baking,
in order that the initial solvents are released, which prevents bubbling.
Temporary corrosion inhibitor used in waterborne coatings to avoid corrosion
during the drying time of the paint. This additive can also prevent corrosion
of in-can aqueous systems during storage.
Surface with minimal reflection, commonly fewer than seven units of gloss
when measured at a 60° angle.
Degree at which a coating is able to face a deformation of its supporting
surface without cracking or flaking.
Coating defect: concentration of pigments at the surface of the paint (floating) or in stains
and patches inside the coating film (flooding). This defect leads to a change in
Additive used to control flocculation, and therefore to control paint rheology.
Particle aggregation in dispersions as a result of decreased colloid stability. Flocculation can
be controlled and therefore can help to control paint rheology.
Ability of a wet coating film to level out after application in order to eliminate
roller marks and produce a smooth uniform film.
Orifice in a spray gun to which the needle is seated.
Pigment which, when exposed to visible light, emits
light of a different wavelength, producing a bright appearance. By absorbing unwanted
wavelengths of light and converting them into light of desire wavelengths,
these colors seem to possess an actual glow of their own.
Polymer that contains atoms of fluorine.
Examples of fluoropolymers are PTFE and PVDF.
Dispersion of air bubbles in water. Foams are stabilized
by surfactants. Foam formation takes place only in the presence of surface-active molecules of
emulsifiers, wetting agents, dispersants, additives or binders.
Additive used to control, inhibit (foam
inhibiting agent), or suppress (defoamer) foam formation in water-based coatings.
Foam inhibiting agents are added to the system whereas defoamers are post-added.
Additive added in the paint formulation to inhibit foam formation.
Acceleration of drying by increasing the ambient temperature.
Additive used in latex paints to withstand freeze/thaw cycles without
coagulation and detrimental effect on application properties
or coating performance.
Types of microscopic plant materials that are very numerous and occur in many
different forms. Their spores, or reproductive bodies are everywhere and await
only proper conditions of moisture and temperature to germinate, grow and
Substance capable of destroying or preventing the growth of fungi. Fungicides
do not provide any residual protection from future mould growth.