scope:

NEN-EN-ISO 12951 specifies four methods of test of textile floor coverings (with or without an underlay, see Clause 9) using the Lisson Tretrad machine. - test A: determination of mass loss of textile floor coverings, also used to assess fibre bind of synthetic pile carpets; - test B: determination of stair nosing appearance change of textile floor coverings; - test C: determination of fibre bind on synthetic loop pile carpets; - test D: determination of fibre bind (hairiness) on needled floor coverings and floor coverings without pile.