| abstract |
It is an object of the present invention to provide a polarizer that has both a high transmittance and a high polarization degree, that is, a white brightness and a display contrast, and a method for producing the same. As a means for solving the problem, the method for producing a polarizer according to the present invention is characterized in that the polyvinyl alcohol film is subjected to at least a swelling step, a dyeing step, a crosslinking step and a stretching step, and in the swelling step, a polyvinyl alcohol- And the crystallinity of the polyvinyl alcohol-based film is controlled to be 25 to 32%. |