Durability and cleaning of matt surface ceramic colour standards Original Research Article

Matt surfaced versions of the Ceramic Colour Standards are produced by CERAM Research by means of an abrasion technique applied to the normally gloss surface. These are available as an alternative to the existing matt standards made from opal glass, pressed powder and `plasticʹ. The existing standards have good matt surfaces but generally have a comparatively short life due to the delicate nature of the surface. This causes problems in maintaining continuity of measurement. The Ceram Research matts also have a good matt surface which, being ceramic should be durable. This paper reports the results of a series of measurements made on selected standards, which show that the standards are durable. In addition it was found that it was possible to clean the standards, returning them close to their original colour values.