Method for producing polarizing plate and polarizing plate

A method for manufacturing a polarizing plate, the method comprising:

• providing a polyvinyl alcohol-based polarizer dyed with at least one or more of iodine and dichromatic dyes;
• providing a protection film and a release film on one surface of the polarizer;
• and
• forming at least one depolarization region by bringing a decoloring solution into local contact with the other surface of the polarizer,
• wherein the release film is provided on a surface of the protection film, which is opposite to a surface facing the polarizer, the depolarization region has single transmittance of 80% or more and a polarization degree of 10% or less at a wavelength band in a range of 400 nm to 800 nm, and a maximum sagging depth of the depolarization region region is 10 μm or less, and
• wherein a haze of the depolarization region is 3% or less, and
• wherein an arithmetic mean roughness Ra of the depolarization region is 200 nm or less.