Determination of Small Colour Differences in Ceramic Tiles - Test Method - BS EN ISO 10545-16:2012
Ceramic tiles. Determination of small colour differences.
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.
It 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.
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 commercial factor used in the tile industry, to determine the acceptability of the colour match.