2017/1/1/ · The model binder and pigments were mixed under high shear in a DAC 150.1 FVZ speedmixer for at least 5 min, and the coating system was then applied to a metal substrate of zinc 5% aluminium alloy coated (average 10 μm) steel (800 μm thick), with a roll bar coater to give a wet-film thickness of 24 μm.