Materials and methodsMaterialsThe PCC was Albaglos S and was supplied by Minerals Technologies as a dispersed slurry at 70% solids. It had a measured average particle size of 320–340 nm and a zeta potential of−27 mV. The carboxylated SB latex (Genflow 5086) at 50% solids was supplied by SYNTHOMER and had a glass transition temperature of − 5 °C with a meas- ured average particle size of 130–140 nm and a zeta potential of − 32 mV. The paper substrate was supplied by Westrock and had a basis weight of 250 g/m2. This paper was chosen because it had high stiffness with a value of 30 stiffness units.