Coating Terms

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Percentage ratio of the amount of reflected light from a surface having the same angle with the normal as the light coming to the surface, to the total amount of light coming to a surface.
Coated surfaces, giving a gloss value over 80 when measured at 60° with a glossmeter, are called high gloss paints.
A term defining the degree to which the gloss of an organic coating is retained after a period of service-life. Generally gloss retention is used for high gloss topcoats and it is the ratio in percentage of original surface gloss to the gloss after a service-life.