BS EN 663:1995 Resilient floor coverings. Determination of conventional pattern depths
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This European Standard spcifies three methods for determining conventional pattern depth by change in appearance of the characteristics of the pattern of resilient floor coverings which are grouped as follows:
Group 1. Patterns where the different bands (in colour and/or relief) are distributed in a uniform manner, where the ratio of pattern to background in small areas of 0,01 m² to 0,02 m² is not more than 1 : 4;
Group 2. Patterns where this ratio varies considerably where some areas of 0,01 m² to 0,02 m2 may contain only one part of the pattern.
