DIN EN ISO 10545-16:2012-05

DIN EN ISO 10545-16 describes a method for utilizing colour measuring instruments for quantifying the small colour differences between plain coloured ceramic tiles, which are designed to be of uniform and consistent colour. The method permits the specification of a maximum acceptable value, which depends only on the closeness of match and not on the nature of the colour difference. This part of DIN EN ISO 10545 is not applicable to colour variations produced for artistic purposes. This test should be applied only when small colour differences between plain coloured tiles are important in a specification or by agreement. Colorimetric measurements are made on reference standard tiles and a test specimen of tiles of the same colour and the differences are calculated. The calculated CMC colour difference of a test specimen is compared to a reference value, using a previously agreed-on commercial factor (cf) or the cf commonly used in the tile industry, to determine the acceptability of the colour match. The committee responsible for this standard is NA 062-02-73 AA "Prüfung von keramischen Bauteilen für Wand- und Bodenbeläge" ("Testing of ceramic building elements for wall and floor coverings") at DIN.