The same procedure for preparing the cationic PCC was used to make the cationic SB latex. A 2.4 mL sample of the 35% wt./wt. cationic PDADMAC was diluted to 2% wt./wt. by addition of 39 mL of water under constant overhead stirring at 1000 RPM for 10 min. In a separate beaker, 20 g (18 mL) of the anionic SB latex at 50% total solids content was diluted to 10% solids by the addition of 82 mL of water while stirring at 1000 RPM. A total of 100 mL of the diluted anionic SB latex suspension was added dropwise to the total 42 mL of PDAD- MAC solution under constant stirring at 1000 RPM. At 10-mL intervals during the dropwise addition of the SB latex suspen- sion, two drops of the suspension were extracted and further diluted with 15 mL of deionized water for measurement of the average particle size and zeta potential. From the values of the particle size and zeta potential, a total volume of 100 mL of the SB latex was determined to be the amount to add dropwise for making subsequent batches of cationic SB latex suspensions. Both suspensions of cationic PCC and cationic SB binder were concentrated back to 55% and 30% solid content, respectively, by air drying in a chemical hood for 48–96 h. The final solid content was then measured using an oven drying method