In order to cut off transmitted light on both sides of the said

摘要

PROBLEM TO BE SOLVED: To provide a cellulose ester film exhibiting especially excellent visibility when it is used to such an optical application as a protective film for a polarizing plate for a liq. crystal displaying apparatus. ;SOLUTION: A film consisting of a cellulose ester wherein the no. of luminance with a size exceeding 0.05 mm of the diameter of the luminance observed when two sheets of polarizing plates are arranged so as to stop transmitting light on both sides of the film is zero per cm² and the no. of luminance with the diameter in the range of 0.01-0.05 mm are at most 500 per cm², is provided.;COPYRIGHT: (C)1999,JPO