Figures 2 and 3 show that the zeta potential and average par- ticle size are dependent on the total amount of PCC or SB latex added dropwise to the PDADMAC solution. The PCC particles remain the same size (320–340 nm) and monodisperse up to a 0.032:1 wt./wt. of PDADMAC: PCC ratio (80 mL volume of PCC added to the 13.2 mL of 2% PDADMAC). By adding the PCC dropwise to the PDADMAC solution, each PCC parti- cle is surrounded by PDADMAC. In essence, the PDADMAC adsorbs to a sufficient level to achieve steric stabilization before colliding with another PCC particle. In this case, steric stabiliza- tion leads to a nanosized (320–340 nm) cationic PCC suspension (see Fig. 2). Above a 0.032:1 of PDADMAC: PCC ratio, the concentration of PDADMAC is reduced, via adsorption on the PCC, to a level where the addition of more PCC to the solution is only partially covered by the PDADMAC, leading to bridging flocculation of the system. This bridging flocculation resulted in the increased particle size of PCC, up to 3.5–4 μm, and a reduc- tion in the zeta potential (+36 to−17 mV) as shown in Fig. 2.