| abstract |
Disclosed is a production method for a phase contrast film that is resistant to high temperature and high humidity and has an excellent long-term storing capability. The phase contrast film production method is a method for producing, by means of solution casting, a phase contrast film having, as the main component, a thermoplastic resin with an elastic modulus of at least 1000 MPa at 80°C and 5% RH, wherein the elastic modulus (E1) at (Tg-10)°C and the elastic modulus (E2) at (Tg+10)°C satisfy formula (1) below, and is characterized by involving a process for extending the phase contrast film at an extension rate of 11 to 100% in the direction of conveyance of the film. (1) 500 ≧ E1/E2 ≧ 10 |