PURPOSE: To obtain a multicolor polarizing plate having micropatterns by bringing a porous polymer film into intimate contact with an electrode pattern, selectively forming a colored layer by electrodeposition from an electrodepositable polymer soln. contg. a dispersed dichroic dye, and repeating electrodepositions using different dyes.
CONSTITUTION: A stripe-shaped transparent electrode 2 is formed on a transparent base 1 and a uniaxially stretched porous film 3 of a polymer, such as PVA, is bonded with pressure onto all its surface. The base 1 is immersed in an electrodepositing soln. prepared by dispersing a dichroic dye hardly or not soluble in water into an aq. soln. of an electrodepositable polymer having carboxy groups solubilized in water by neutralizing it with an inorg. alkali or the like. For example, a red colored layer 4 is formed by impressing voltage to the slected one of the electrodes 2. Likewise, a green colored layer 5, and a blue colored image 6 are successively formed by using each different electrode and each different dichroic dye. As a result, a multicolor polarizing plate having micropatterns can be easily prepared.
SUGINOYA MITSURU
KAMAMORI HITOSHI
