Key1 Light source2 Observer3 SpecimenFigure 6一川umination of specimens6 Auxiliary materials6.1 Felt, in the form of circles as specified in ISO 12947-1,serving as a support material for the two specimens.They have the following dimensions:a)b)top (test specimen holder): (90士1) mm diameter;bottom (pilling table): (140 +o) mm diameter.6.2 Abradant, against which the test specimen is abraded, normally the same as the fabric under test. Undercertain circumstances, e.g. upholstery fabrics, the wool abradant fabric specified in ISO 12947-1 is used. Thechoice of abradant shall be stated in the test report.Circles of the abrading fabricon each abrading table.measuring( 140 0 } mm in diameter or (150 1 2) mm in length and width are mounted