Testing Standard
International assessment methods define the resistance of textile colors to various physical and chemical agents during processing and use. The ISO 105 color fastness series of standards outlines the protocols for exposing dyed materials to light, washing, rubbing, and perspiration. These tests establish a uniform baseline for commercial transactions between fabric mills and garment brands.
Experimental Procedure
Specimen preparation involves mounting the dyed sample alongside standardized multi-fiber adjacent fabrics to evaluate both color change and staining. When executing ISO 105 color fastness tests, technicians subject the assembly to controlled mechanical action or chemical exposure in a laboratory washing machine. The treated specimen is then dried under specified conditions before assessment to ensure repeatable results.
Material Evaluation
Visual comparison against a standardized grey scale determines the numerical rating from one to five, where five represents no change. Modern laboratories also use spectrophotometers to calculate these ISO 105 color fastness ratings objectively to eliminate human bias. This rating indicates how well the textile will perform under consumer wash conditions.
Quality Benchmarking
Brands specify minimum ratings depending on the intended use of the garment. Casual wear requires high wash fastness while outdoor gear requires light resistance. These benchmarks ensure the product maintains its appearance.