ISO 105-C07:1999 pdf download – Textiles — Tests for colour fastness — Part C07: Colour fastness to wet scrubbing of pigment printed textiles.
New brushes shall be blunted before use by scrubbing the brush for at least 1 00 cycles using abrasive or cloth paper (see note 2). If necessary repeat until the brush surface is perfectly aligned with the abrasive or cloth paper on the base board. Depending on the brush used, a residue may be noticed on the abrasive paper. NOTE 1 A brush complying with following requirements has been found suitable: Linear density (of fibre): 1 02,8 dtex Tensile strength (of fibre): 0,032 5N (cv 4,33 %) Breaking elongation (of fibre): 6,9 % (cv 1 2,8 %) Modulus of elasticity (of fibre): 0,002 2 N/dtex Press capability (of brush): 2,44 kg (cv 8 %) Pull out from brush (tuft): 1 4,2 N (cv 1 8 %) Pull out from brush (single fibre): 0,8 N (cv 38 %) where cv is the coefficient of variation. NOTE 2 Abrasive paper of 1 20 mesh (0 #) black aluminium oxide cloth has been found suitable. If other abrasive paper is used, it should be reported. 4.3 Soap, without optical brightener, as specified in 4.2 of ISO 1 05-C01 :1 989. 4.4 Sodium perborate. 4.5 Reference detergent. At least two different reference detergents may be used: a) ECE reference detergent 77, without optical brightener, or b) 1993 AATCC standard reference detergent WOB. Both are specified in 4.4 of ISO 1 05-C06:1 994. Other detergents may be used as agreed between interested parties and reported in the test report. 4.6 Grey scale, for assessing change in colour, complying with ISO 1 05-A02:1 993. 4.7 Grade 3 water, see 8.1 of ISO 1 05-A01 :1 994.
5 Test specimen 5.1 If the textile to be tested is a fabric, prepare one specimen not less than 80 mm 3 250 mm, with the long direction parallel to the warp yarns (or the direction of manufacture). If multicoloured textiles are to be tested and all colours on the textile cannot be included in one specimen, prepare further test specimens and assess each colour separately. 5.2 If the textile to be tested is yarn or thread, knit it into fabric to provide a specimen at least 80 mm 3 250 mm. The knit construction should be agreed on between the interested parties. Alternatively, the yarn can be wound on a plastic plate. The construction chosen can influence test results. 6 Procedure Dissolve 5 g of soap (4.3) and 2 g sodium perborate (4.4) in 1 l of water (4.7); or dissolve 4 g detergent A (4.5) together with 1 g sodium perborate (4.4) or 4 g detergent B (4.5) in 1 l of water(4.7). Pour about 250 ml of the prepared soap solution or about 250 ml prepared detergent solution into a 500 ml beaker, so that the ratio of solution to specimen is not less than 50:1 . Raise the temperature of the solution to one of the alternatives given below and indicate the alternative selected in the test report.