Electrophoretic lacquer and oven baked lacquer you mentioned may not be necessarily two different things. Lacquer coating may be applied by any route from a simple dipping to the more sophisticated electrophoretic method (EPD: electrophoretic deposition) as indicated. It is understood that drying in air flow or with the further application of heating/baking (such as in a oven) is usually necessary to remove the lacquer solvents or moisture residue.

As a general coating technique, EPD relies on the migration and deposition of charged particles from a solution onto an opposite-polarity substrate (workpiece) under the application of an external power supply. The solution must be colloidal type, and depending on the solution pH, the loaded suspension particles (oxides or other ceramics) or macromolecules (such as acrylic resins) can acquire either positive or negative surface charges on surface, which make them mobile under E-field. EPD differs from processes such as electroplating in that it deposit fine particles as opposed to ions. One of the most established industrial applications of EPD is the formation of paint coat [primer] on car bodies. In terms of merits, EPD has high throwing power, thus coating is more adherent and better able to cover small holes or crevices than dip coating.