Polystyrene (PS) were doped with the photochromic dye, cis-1,2-dicyano-1, 2-bis(2,4,5-trimethyl-3-thienyl)ethene (CMTE), using a simple vacuum process, termed the "vapor transportation method." CMTE-doped PS molds showed photochromism. The CMTE-doped PS molds were examined by Optical microscopy and SEM/Energy dispersive X-ray (EDX) elemental analysis. Optical microscopy and sulfur (S) elemental analysis confirmed formation of CMTE-doped regions with rapid CMTE concentration decreases at the CMTE-doped region/PS substrate interfaces, although the doping temperature was much higher than the glass transition temperature (T-g) of PS.