no dye fading the aatcc grey scale for color change is also used to evaluate the retention of basic dyestuffs on the cationic dyeable nylon component of cadd carpets the untreated shade is compared to the treated shade no color loss would be rated a 5 and severe color loss would rate a 1 fig1 demonstrates stainresistance and colorfastness results of four different experiments using the cadd carpet samples supplied by mohawk u00ae the display board of samples is divided into four sections a b c amp d fig2 demonstrates the colorfastness of kazan style color 628 to tannic acid and an sac stainblocker section a demonstrates the stainresistance of cadd carpets treated with tannic acid using the wet heat continuous steam fixation method the tannic acid samples are treated with 5 owf tannic acid by applying a 2 5 solution of tannic acid at 200 add on to the carpet samples the treated carpet samples are then steamed for 4 minutes to fix the tannic acid to the nylon fibers the control samples are left untreated after the samples are rinsed and dried four staining solutions are applied cherry kool aid u00ae and 10 bleach are applied on the light medium and dark shade of the kazan style carpet supplied by mohawk u00ae mustard and 10 betadine are applied on the medium shade and the basic dyed only shade of the kazan style carpet the stainresistance of the samples are rated according to the protocols described in aatcc tm 175 and the aatcc grey scale for color change.