Study of Desalination and Changing the Counter Ion of Mono- Chlorotriazinyl Reactive Dye on Dyeing Nylon 6.6

Anionic reactive dyes used to dye nylon suffer from failures due to the poor efficiency caused by low degree of exhaustion and fixation. from the previous work , the dyeing efficiency of procion rubine xl+ on modified nylon was particularly week and hence offers the widest scope for an in depth investigation in to variables that affect the dyeing process. in this paper, a number of attempts were made to improve the fixation efficiency of procion rubine xl+ on modified nylon. the process variables were studied:(a) the effect of desalination, as well as (b) the effect of changing the counter ion from sodium to trimethyl ammonium. consequently, reducing the electrolyte concentration and changing the counter ion resulted in reduced fixed color yield which means in all cases fixation yields generally inferior to those obtained from the commercial sample of procion rubine xl+. prog. color colorants coat. 4(2011), 7-14. © institute for color science and technology.