Commercial Cationic Starch used in this study was obtained from Iran Wood and Paper Company (Chouka), Iran (Table 1). It was prepared by suspending certain amount of Cat St powder in 100 mL of dis- tilled water and heating the suspension to 80◦C on a water bath with continuous stirring, and then holding the same at this tem- perature for 25 min after the onset of gelatinization. The solutions were then diluted to 200 mL with distilled water, and refrigerated prior to use. All stock solutions used in the work were always freshly prepared to avoid any possible degradation.