| 摘要 |
The present invention mainly provides a method for producing a retardation film having a small fluctuation of the optical compensation property and being relatively easy to produce. A method for producing a retardation film comprises: a coating process, wherein a coating liquid comprising a solvent and a material having refractive index anisotropy dissolved or dispersed therein is applied on a long continuous resin substrate; and a drying process, wherein the solvent in the coating liquid applied in the coating process is dried at temperature difference of the long continuous resin substrate in width direction within 10° C. at least until a remaining solvent amount in the coating liquid becomes 50 wt % or less.
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