A - Z list of keywords and terms from the coatings industry.
The dried coating, which appears to be flat and two dimensional, but whose appearance and properties differ between the surface, the body of the film and the interface with the substrate. If the film is not dried, it is generally called a 'wet' film.
An instrument for measuring the dry (DFT) or wet (WFT) film thickness.
The process of removing solid and semi-solid impurities from a liquid coating by use of filters. One of the important jobs of a paint maker is to prevent the impurities getting there in the first place.
Coating which will delay the substrate from burning.
BS476 Part 7. Standard that relates the distance a flame will spread over a surface.
The ability to catch fire and burn.
Time duration for the volatile content of a coating to evaporate.
The minimum temperature whic h the vapour of a flammable product will ignite, if a flame or spark is present.
Rubbing of a substrate / coating with an abrasive.
Most substrates move - paper and plastics demand that inks be particularly flexible - but even wood, steel and concrete move with temperature changes or when the surface is knocked. Brittle coatings which fly off at times like this would be useless. Some resins are naturally more flexible than others and may be used in blends to give the coating flexibility. Additives called plasticisers are also often used. Care, however, is need to balance out the amount of flexibility in the formulation with other properties of the coating such as hardness and ease of cleaning.
Flexo printing is a form of relief printing which uses a flexible plate. Firstly ink is transferred from the ink bath to the printing plate via the anilox roller. The substrate, which is usually plastic film or carton board for the printing industry, is fed from a reel through the machine in a continuous web.
Non uniform disperison of pigments resulting in agglomerates.
Effect when pigment particles float to the surface, causing a different colour to the original wet state.
Ability of a coating to spread.
Cup designed to measure a coating's viscosity as it flows through an orifice.
Increased drying by raising the temperature above ambient.
A coating applied at maximum film thickness without sags and runs.
The furniture market is made up users who coat both wooden and metal furniture using clear or pigmented coatings. Coatings may be applied by roller, spray or curtain, and are cured by air drying, heat or UV.