ISO INTERNATIONAL STANDARD 15703 IULTCS IUF 423 First edition 1998-05-01 Leather Tests for colour fastness - Colour fastness to mild washing Cuir- Essais de solidite des teintures - Solidité des teintures au lavage xnop 54 SO Reference number ISO 15703:1998(E) IULTCS/IUF423 INTERNATIONAL STANDARD @ ISO ISO 15703:1998(E) Leather Tests for colour fastness Colour fastness to mild washing Scope 1 This International Standard specifies a method for determining the resistance of leather to mild washing under specified conditions. The method is suitable for assessing the change in colour of the leather, the staining of an adjacent textile fabric and any change in the finish of the leather. This method can also be used leather preparation for assessing the change in any other Normative references 2 The following standards contain provisions which, through reference in this text, constitute provisions of this International Standard. At the time of publication, the editions indicated were valid. All standards are subject to revision, and parties to agreements based on this International Standard are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below. Members of EC and ISO maintain registers of currently valid International Standards. testing. IsO 105-A02:1993, Textiles - Tests for colour fastness Part A02: Grey scale for assessing change in colour. staining. ISO 105-A04:1989,Textiles - Tests for colour fastness — Part Ao4: Method for the instrumental assessment of the degree of staining of adjacent fabrics. @ISO ISO 15703:1998(E) IsO 105-A05:1996, Textiles — Tests for colour fastness — Part A05: Instrumental assessment of the change in colour for determination of grey scale rating IsO 105-F10:1989, Textiles — Tests for colour fastness — Part F10: Specification for adjacent fabric: Multifibre. IsO 2419:1972, Leather — Conditioning of test pieces for physical tests. Iso 3696:1987, Water for analytical laboratory use Specification and test methods. IUP 2, Sampling Principle 3 A composite specimen of the leather and an adjacent textile fabric is agitated together with PTFE rods in a washing liquor, rinsed and then squeezed and dried. The change in colour of the leather and the adjacent textile fabric are assessed with the standard grey scales and, if applicable, any changes in the finish are noted. The general colour fastness testing principles used are in accordance with those described in IsO 105-Ao1, taking into account the differences between textile substrates and leather. 4 Apparatus and materials Ordinary laboratory apparatus and 4.1 Test apparatus1), consisting of a rotating drum of capacity approximately 500 ml made typically of glass or stainless steel and sealed using solvent-resistant rubber gaskets, for example. 4.2 PTFE rods2), 20 mm ± 2 mm long, 7 mm to 9 mm in diameter. 4.3 Plain-weave fabric, measuring 100 mm x 36 mm, for use as adjacent fabric. NOTE 1 Type DW multifibre fabric2) conforming with ISO 105-F10 is normally used. 4.4 Detergent2), usually sodium lauryl sulfate, PH EUR Il quality or equivalent. 4.5 Water, grade 3 as defined in ISO 3696. 4.6 Grey scale for assessing staining, in accordance with ISO 105-A03, and grey scale for assessing change in colour, in accordance with ISO 105-A02. NOTE 2 If a suitable instrumental system is available for measuring the change in colour in accordance with IsO 105-A04 and IsO 105-A05, this may be used instead of the visual assessment method. 2) Examples of commercial sources are given in annex A. 2