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Textile floor coverings - Tests using the Lisson Tretrad machine

The floor coverings are exposed, at constant load and slippage and for a prescribed number of double passages, to the action of a four-footed wheel (Tretrad), the feet of which are fitted with interchangeable rubber soles.

This standard specifies four methods of test of textile floor coverings using the Lisson tretrad machine.

Test A -- Determination of mass loos of textile floor coverings also usede to assess fibre bind of synthetic cut 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.

http://www.bttg.co.uk/PDFs/FloorCover...