Patent ID: 8094375

Claim:
A method for producing a polarizer having improved cross transmittance, the method comprising: a dyeing step of dyeing a polyvinyl alcohol (PVA)-based film with molecular iodine by immersing the PVA-based film in an aqueous iodine solution; a cross-linking step of absorbing the molecular iodine into the PVA- based film using an aqueous boric acid solution; a stretching step of arranging the molecular iodine in the certain direction by stretching the PVA-based film in a certain direction; adding a phosphate compound to the iodine aqueous solution of the dyeing step or the aqueous boric acid solution so that a weight ratio of the phosphate compound to the boric acid is in a range of 1:0.1 to 1:10; and drying, in an oven, the PVA-based film in which the molecular iodine is oriented.