In the textile industry, fastness measurement processes are performed to determine the resistance of dyes applied on fabric to external factors frequently encountered in daily life such as light, heat, rubbing, sweat and salt. The resistance of the dyestuffs against these external factors should not fall below a certain value according to the fastness values ​​examined. This property is related to the quality and quality of the dyes. The various fastness measurements carried out by the authorized laboratories determine whether the dyed yarn has left the paint in the next use or how much dye has left, and also how much it has contaminated the surrounding materials.

Authorized laboratories determine frosting or frost fastness according to the following standards:

• AATCC 119 Color change due to flat wear (icing): Curtain fiber method (Test method 119)
• AATCC 120 Color change due to flat wear (icing): Sanding Method (Test method 120)

This test method was prepared to assess the color resistance of fabrics in the region caused by flat abrasion. It can be used for all fabrics, but is particularly sensitive to colored fabrics. This method is particularly susceptible to discoloration of durable fabrics, where some fibers in the fabric texture are abraded faster than other fibers. The method is also effective on certain garments which are subjected to relatively mild abrasive effects and have relatively short wear periods. Any change in the color of the fabric sample is evaluated by the gray scale used in the fading evaluation (TS 423-2 EN 20105-A02 Textile - Methods for determining color fastness - Section A02 - Using the gray scale for the evaluation of fading)

These tests should be performed in accredited laboratories. These laboratories have a strong technological infrastructure and trained and experienced staff and are able to provide the most accurate, reliable and precise results quickly.