Additive used to wet and disperse by steric or electrostatic stabilization. Allows a
higher filling rate thanks to its viscosity-reducing effect.
Chemical which reduces and/or eliminates foam. Mainly used in aqueous paints where it pops bubbles when squirted
over water surfaces. (more about defoaming technology)
Chemical solution or compound designed to remove grease, oil, and similar
Separation between layers of coats due to very poor adhesion.
Mass per unit volume, usually expressed as grams per milliliter or pounds
per gallon. The lower the density of the paint, the less weight added to the
Chemical additive introduced to remove or mask undesired odor in liquid paints and applications. This
type of additive is mainly used in DIY decorative and architectural paints.
Temperature of a surface at which condensation of moisture will occur (under
ambient temperature and relative humidity).
Dry film thickness.
Portion of the volatile components of a coating which
is not a true solvent. Has minimal effect on the viscosity and
reduces the solids content in applied coating formulations.
Dip coating (extended definition)
Process that consists of applying a coating by simple dipping in a bath.
Level of dispersion of a pigment which depends on its chemical nature and particular
structure, on the liquid phase in which it has been dispersed, on the method
of dispersion... .
Surface-active substance used to facilitate the suspension of solid compounding
materials in a liquid medium and to stabilize the dispersion thereby produced.
An efficient dispersing agent can perform pigment wetting, dispersing, and stabilizing.
Dispersing agents are different depending on the nature of the paint. Polyphosphates,
styrene-maleinates and polyacrylates are used in water-based paints whereas lecytine,
fatty acid derivatives and low molecular weight modified alkyd and polyester
resins are used in solvent-based and solvent-free paints.
(more about dispersion mechanism)
Suspension and distribution of tiny particles (pigments) in a liquid (polymer matrix).
Spray cabin in which the air movement is from the ceiling through the floor.
Chemical agent which promotes oxidation and drying of a coating film. Mainly
used in oil based coatings, printing inks and varnishes. Driers are usually
metallic compositions and are available in both solid and liquid forms.
Different groups of driers are available: primary
driers (active driers), secondary
driers (auxiliary driers), and combination
Overspray or bounce back, producing a sandy finish due to the sprayed particles
having partially dried before reaching the surface.
Coating which is designed to dry rapidly so that the overspray can be easily
removed from the surfaces below.
Time needed for an applied coating film to reach a set stage of cure or hardness.
Dry to tack free
Stage at which a coating film will form a skin to which dust will not adhere.
Dry to touch
State of dry at which a coating film will not transfer onto an item lightly
touched against it.
Dry to handle
Degree of cure at which a film will resist deformation due to handling.
Dry to recoat
Time required for a cured film to dry prior to the application of a second
Coating defect: loss of gloss or sheen.
Colored sustance generally soluble in the polymer. Dyes exibit
good transparency and high tinctorial strength. One critical
property to consider is migration.