scope:

This standard specifies 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.