本机用于试验染色之织物、皮革经摩擦之脱色程度。试法系以干燥或湿润之白棉布，包于摩擦锤，然后往复摩擦夹在试台上的试片，即可评定染色坚牢度等级。 It`s used to determine the discolored extent for the dyed textile or dyed leather by abrasion method. At first, coat abrasive hammer with dry or wet white cotton cloth then drive it to repeatedly abrade the specimen clamped on testing table for ten times within 10 seconds to examine grade of color-dyeing firmness.