Painting Terms

Abrasion Resistance

Is a measure of the ability of the film to resist disintegration when a mechanical action is applied.

Checking

The formation of line cracks on a paint film.

Acrylic Resin

Resins made from derivatives of acrylic or methacrylic acid.

Coat

Film of paint of any kind (including varnish) applied to a surface in a single application. Including: Glaze coat: a thin, non-protective application of paint designed to allow effective adhesion of further coats.

Alkyd Resin

Synthetic resins formed by the condensation of polyhydric alcohol with polybasic acids.

Coating Material

Film-forming material (paint, etc.) used for protection or decoration.

Anti-Condensation Paint

A paint designed to help minimise condensation of moisture on cold surfaces such as metal or masonry surfaces.

Coating System

One or more coating materials applied in a specified sequence and number of coats.

Biocidal Wash

A solution based on Biocides designed to kill and arrest the development in the substrate of fungal or algae contamination.

Cob webbing

Solutions of certain polymers, when sprayed, produce these fine strands instead of the normal atomised particles.

Bitumen Paint

A bituminous paint containing a predominating amount of bitumen.

Colour Match

If no difference in colour between a paint and a given standard can be detected (usually under controlled lighting conditions) the paint is said to be colour matched.

Bleeding

An unattractive stain or discoloration caused when a soluble coloured substance diffuses through the coat above.

Combing

A method of decoration by use of special combs over wet paint. The effect often imitates the texture of wood.

Blistering

Bubble projections in a dry film of a paint. Normally caused by moisture or other problems in the substrate. These lead to loss of paint adhesion and lifting of the film.

Conventional Spraying

See Spraying.

Bloom

A milky-white, cloudy deposit which can collect on a gloss film, resulting in a loss of gloss and dulling of the finish colour.

Copolymer

When two dissimilar types of molecules are polymerised together so that highly polymerised products are formed, containing each type of molecule in a chemical union copolymerisation is said to have happened.

Chalking

Is visible evidence of disintegration on a pigmented paint film. It often occurs when the paint film has disintegrated.

Cracking

The breakdown of a coating's dry film due to age and/or weather.

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