Patent ID: 8114326

Claim:
A process for producing a cellulose ester film comprising: a fabrication step of casting a solution having a cellulose ester dissolved in an organic solvent on a support and evaporating the solvent to form a cellulose ester film; a stretching step of subsequently stretching the film; and a drying step of drying the resulting film, which further comprises a step of, after completion of the drying step, performing a heat treatment at a temperature of from 150 to 200° C. for one minute or more, wherein the cellulose ester film has a front retardation Re of from 20 nm to 100 nm relative to light having a wavelength of 590 nm at 25° C. and 60% RH; a retardation Rth in a film thickness direction of from 60 nm to 400 nm relative to light having a wavelength of 590 nm at 25° C. and 60% RH; and a shrinkage factor in a slow axis direction of less than 1% in the range of from a glass transition temperature to a temperature of 40° C. higher than a glass transition temperature, wherein the cellulose ester film is for a VA mode.