Test and determine the color fastness to perspiration of various textile materials and fabrics, as well as the resistance of various dyed, colored textiles to perspiration, seawater, clean Water, saliva, and phenol yellow. (Scope of application): Sweat stain resistance test for various textile materials and textile products and the determination of the performance of such types as dyeing, staining, sweat on colored fabrics, resistance to sea water, clean water, saliva, phenol yellow, etc.