1.1 This test method is designed to determine the amount of color transferred from the surface of colored textile materials
to other surfaces by rubbing. It is applicable to textiles made from all fibers in the form of yarn or fabric whether dyed,
printed or otherwise colored. It is not recommended for use for carpets or for prints where the singling out of areas may
be too small using this method.
1.2 Test procedures employing white test cloth squares, both dry and wet with water, are given.
1.3 As washing, drycleaning, shrinkage, ironing, finishing, etc., may affect the degree of color transfer from a material,
the test may be made before, after, or before and after any such treatment.
2. Principle
2.1 A colored test specimen is rubbed with white crock test cloth under controlled conditions.
2.2 Color transferred to the white test cloth is assessed by a comparison with the Gray Scale for Staining or the Chromatic
Transference Scale and a grade is assigned.
3. Terminology
3.1 colorfastness, n.—the resistance of a material to change in any of its color characteristics, to transfer of its colorant(s) to adjacent materials, or both, as a result of the exposure of the material to any environment that might be encountered during the processing, testing, storage or use of the material.
3.2 crocking, n.—a transfer of colorant from the surface of a colored yarn or fabric to another surface or to an adjacent area of the same fabric principally by rubbing.
4. Safety Precautions
NOTE: These safety precautions are for information purposes only. The precautions are ancillary to the testing procedures and are not intended to be all inclusive. It is the user’s responsibility to use safe and proper techniques in handling materials in this test method. Manufacturers MUST be consulted for specific details such as material safety data sheets and other manufacturer’s recommendations. All OSHA standards and rules must also be consulted and followed.
4.1 Good laboratory practices should be followed. Wear safety glasses in all laboratory areas.
5. Apparatus and Materials
5.1 AATCC Crockmeter (see 13.2, 13.3 and Fig. 1).
5.2 Test Cloth, cut in 50 mm squares (see 13.4).
5.3 AATCC Chromatic Transference Scale (see 13.5).
5.4 Gray Scale for Staining (see 13.5).
5.5 White AATCC Textile Blotting Paper (see 13.5).
5.6 Specimen Holder for Crockmeter(see 13.3).
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