the chemicals used in the dye mix without any dye the purpose of increasing the total pickup to 300 in cases where the yarn would normally pick up less was to provide enough liquid to saturate the yarn in the shallow pan once the total amount of liquid was in the pan the sock was added and then pressed by a simple plastic plate to evenly squeeze the liquid throughout the sock the sock was then placed on a frame containing rows of support pins 5 inches apart this allowed the center portion of the sock to be supported without contact with any metal etc the frame was inserted into a tray type steamer at 210 deg f for 6 minutes the frame and sample were removed and the sample rinsed with cold water all the rinse liquid was captured and placed in an ahiba dye tube water was added to the rinse liquid to provide a 30 1 liquor ratio for the subsequent dyeing an equal weight of regular nylon sock was placed in the ahiba sample support and the rinse liquor was totally exhausted onto the nylon the percent dye fixation on the cationic nylon dyed sample dyed at both a ph of 4 0 and 1 8 and the percent dye fixation on the exhaust dyed regular nylon were measured on a spectrophotometer the results are summarized in table 1 table 1__________________________________________________________________________dyestuff name 5 g l dyestuffconcentration dyeing rinse dyeing rinse dyeing rinse__________________________________________________________________________ ph 4 0 ph 1 8 increase decreasenylosan.