We introduce a new pigment processing approach, namely Lewis acid pigment solubilization (LAPS), for the fabrication of organic pigment thin film devices. The process involves the solubilization of an organic pigment in a Lewis acid/nitromethane solution. The resulting solution can be used to solvent cast pigment/Lewis acid thin films, which are then washed with an aqueous solution to remove the Lewis acid and give the final pigmented layers. Alternately, the pigment/Lewis acid solution can be used for acid pasting to give pigment wet cakes, which can then be used for preparing In Situ pigment dispersions suitable for solvent coating. A wide range of organic pigment thin film devices can be fabricated using these processes, as we demonstrate in this article for the fabrication of organic photoreceptors.