AATCC 23-1999 Colorfastness to Crocking: Textile Floor Coverings— AATCC Crockmeter Method.
1.1 This test method is designed to determine the degree of color transfer from the surface of textile floor coverings to other surfaces by rubbing. The intent is to reproduce as near as possible true-to-life situations in all constructions whether dyed, printed or otherwise colored.
1.2 Test procedures employing white test cloths, both dry and wet with water, are given.
1.3 As the use surface of a textile floor covering may be exposed to various con- ditions in true-to-life situations, such as soil, stains, cleaning, shampooing and application of chemical treatments such as antisoils, antistats, antimicrobials, etc., the test may be made before, after or be- fore and after such situations.
2. Principle
2.1 A colored test specimen held on the base of a crockmeter is rubbed with a white test cloth under controlled conditions.
2.2 Color transferred to the white test cloth is rated by comparison with the AATCC Chromatic Transference Scale or Gray Scale for Staining and a grade is assigned.
3. Terminology
3.1 carpet, n.—all textile floor cover- ings not designated as rugs.
3.2 colorfastness, n.—the resistance of a material to change in any of its color characteristics, to transfer of its colo- rants(s) to adjacent materials or both, as a result of the exposure of the material to any environment that might be encoun- tered during the processing, testing, stor- age or use of the material.
3.3 crocking, n.—a transfer of colo- rant from the surface of a colored yarn or fabric to another surface or to an adjacent area of the same fabric principally by rubbing.
3.4 rug, n.—a textile floor covering of limited area which is complete in itself and is intended for use as a partial covering of a floor or another floor covering.
3.5 textile floor covering, n.—an article having a use-surface composed of textile material and generally used for covering floors. 3.6 use-surface, n.—of textile floor covering, the part of a textile floor cover- ing directly exposed to foot traffic.
4. Safety Precautions NOTE: These safety precautions are for information purposes only. These safety 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 13.1, 13.2).
5.2 AATCC Crock Block (see 13.2).
5.3 Crockmeter Test Cloth (see 13.3).
5.4 AATCC Chromatic Transference Scale (see 13.4).
5.5 Gray Scale for Staining (see 13.4).
5.6 White AATCC Textile Blotting Paper (see 13.4).
6. Test Specimens
6.1 Two specimens are used, one each for the dry and the wet tests.
6.1.1 Additional specimens may be used to increase the precision of the average.
6.2 Floor covering material: pieces at least 50 × 150 mm. If the pile lay is distinguishable, cut the specimen with the pile lay pointing in the long direction.
6.2.1 Larger or full width lab samples may be used without cutting individual specimens, when multiple tests are needed and when using for production testing.AATCC 23 pdf download.