Dope composition, optical film, method for manufacturing optical film, polarizing plate, and liquid crystal display device

Through the dope composition of the present invention, containing an acrylic resin having a weight-average molecular weight (Mw) of at least 250,000, and a solvent in which the mass ratio (A:B) of methylene chloride (A) and a C1-4 alcohol is 85:15-50:50, the cellulose ester content of the doping composition being less than 0.5% by mass with respect to the acrylic resin, high viscosity is obtained, streaks do not readily form in a flow-cast film when the dope composition is discharged from a flow casting die, and the resultant polymer film can easily be separated from a metal support. The present invention also provides an optical film, a method for manufacturing an optical film, a polarizing plate, and a liquid crystal display device.