Abstract: A polarizing plate includes at least: a polarizer layer containing a polyvinyl alcohol-based film dyed with iodine; and one or more other layers except for the polarizer layer, in which the polarizer layer contains a compound which has polyiodide ion I5? reduction capability in iodide compound- and iodine-containing solutions, and at least one of the one or more other layers contain a compound which has polyiodide ion I5? formation capability in an iodide compound-containing solution.

Abstract: A cellulose acylate film, containing: at least two or more of chelating agents having different pKa values from one another, wherein the chelating agents comprise: a chelating agent A having at least one functional group whose acid dissociation constant pKa, measured at 25° C. in a mixed solvent having a mixing ratio of tetrahydrofuran 60 ml/water 40 ml, is 6 or less; and a chelating agent B having at least one functional group of a conjugate acid whose pKa, measured at the same condition, is 7 or more; and a cellulose acylate, and wherein the number of bright spots of the cellulose acylate film is equal to or less than 500/cm2; a polarizing plate protective film, a polarizing plate and a liquid crystal display using the same.

Abstract: Provided is a polarizer durable against high-temperature and high-humidity conditions, small in changes in the single plate transmittance, and a liquid crystal display device. A polarizer comprising a polyvinyl alcohol-based resin, a dichroic colorant, and a compound, etc. represented by the formula (1) below, the content of the compound represented by the formula (1) being 0.01 to 30 parts by mass relative to 100 parts by mass of the polyvinyl alcohol based resin. In the formula (1), each of Ri and R3 independently represents a hydrogen atom, C1-20 straight-chain alkyl group, C3-20 branched alkyl group, C3-20 cycloalkyl group, 02-20 alkenyl group or C6-20 aromatic group, and R5 represents a substituent.

Abstract: Provided is a polarizing plate having improved single plate transmittance under high-temperature and high-humidity conditions, and a liquid crystal display device using the same. A laminate comprising a polarizer, and an adhesive layer adjoining to at least one surface of the polarizer, the adhesive layer containing a resin and a compound, etc. represented by the formula (1) below. In the formula (1), each of R1 and R3 independently represents a hydrogen atom, C1-20 straight-chain alkyl group, C3-20 branched alkyl group, C3-20 cycloalkyl group, C2-20 alkenyl group or C6-20 aromatic group, and R5 represents a substituent.