Abstract: An additive composition for electrophoretic baths, an electrophoretic bath, and a process for achieving thicker films by electrophoretic deposition techniques by providing an aqueous solubilized organic resin medium containing additive components in the range of about 1 to 15% by weight of solids in the bath of a compatible surfactant, by 1 to about 15% of a reactive viscosity modifier by weight of solids in the medium, and from about 2 to about 15% of a relatively water immiscible solvent based on the weight of solids in the bath. The additive components may be formulated into a premixed composition of predetermined concentrations of the components and then added to the e-coat bath, or the components may be added to an e-coat bath separately in predetermined amounts. In a preferred embodiment the ratio of surfactant to reactive viscosity modifier to solvent is between 1:0.75:0.75 and 1:5:6.