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Crocking
(AATCC 8, Colorfastness to Crocking AATCC Crockmeter Method)

Crocking is the 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. This test method is designed to determine the amount of crocking. It is applicable to textiles made of all fibers in the form of yarn or fabric whether dyed, printed, or otherwise colored.

Three replicate specimens are each tested with wet and dry test cloth using the AATCC crockmeter for ten revolutions per cycle. The crock cloth is evaluated using the AATCC Chromatic Transference Scale. A rating of 1 indicates extreme crocking, and a rating of 5 indicates negligible or no transfer of color.

Colorfastness to Laundering
(AATCC 61, Colorfastness to Laundering, Home and Commercial: Accelerated)

This accelerated test is designed for evaluating the colorfastness to laundering of textiles, which are expected to withstand frequent laundering. The fabric color loss resulting from detergent solution and abrasive action of five typical home launderings are closely approximated by one 45-minute test. Specimens are tested under appropriate conditions similar to those occurring in five home launderings. The abrasive action is the result of the frictional effects of fabric against the container, the low liquor ratio, and the impact of the steel balls on the fabric.

Colorfastness to Perspiration
(AATCC 15)

This test method is intended for use in determining the fastness of colored textiles to the effects of perspiration. It is applicable to dyed, printed, or otherwise colored textile fibers, yarns, and fabrics of all kinds and to the testing of dyestuffs as applied to textiles.

Three specimens of colored textile are soaked in simulated acid perspiration solution, subjected to fixed mechanical pressure (10 lbs.) in the AATCC Perspirometer, and allowed to dry slowly at a slightly elevated temperature (100 F) in a circulating air oven for at least 6 hours. The effect of the test solution on the specimens is evaluated using the Gray Scale for color change; staining is evaluated on multi-fiber fabric using the gray scale for staining. Specimens are evaluated in the Macbeth Light Booth under daylight conditions.

Colorfastness to Water
(AATCC 107)

This method is designed to measure the resistance to water of dyed, printed, or otherwise colored textile yarns and fabrics of all kinds. Distilled or de-ionized water is used in this test method because natural (tap) water is variable in composition.

The specimen, backed by multi-fiber fabric, is immersed in water under specified conditions of temperature and time, and then placed between plastic plates under specified conditions of pressure, temperature and time in the Perspirometer and oven. The change in color of the specimen and the staining of the attached multi-fiber test fabric are observed using the AATCC Gray Scale for Color change and the AATCC Chromatic Transference Scale respectively. Specimens are evaluated in the Macbeth Light Booth under daylight conditions.

Colorfastness to Water: Sea
(AATCC 106)

This method is designed to measure the resistance to seawater of dyed, printed, or otherwise colored textile yarns and fabrics of all kinds. Artificial seawater is used in this test because seawater is variable in composition.

The specimen, backed by multi-fiber fabric, is immersed in artificial seawater under specified conditions of temperature and time, and then placed between plastic plates under specified conditions of pressure, temperature and time in the Perspirometer and oven. The change in color of the specimen and the staining of the attached multi-fiber test fabric are observed using the AATCC Gray Scale for Color change and the AATCC Chromatic Transference Scale respectively. Specimens are evaluated in the Macbeth Light Booth under daylight conditions.