Patent ID: 7163726

Claim:
A laminated body comprising an isotropic aqueous solution obtained by dissolving 100 parts by weight of a water-soluble polysaccharide derivative having a weight-average molecular weight of about 10,000 to about 200,000 and having a nonionic amphipathic functional group, in about 100 to about 2000 parts by weight of an aqueous medium composed of (i) water in an amount of about 25 to about 450 parts by weight with respect to said polysaccharide derivative and an amphipathic substance with a molecular weight of about 60 to about 5000, said isotropic solution being laminated between plates that are partially transparent and allow direct vision of said aqueous solution, wherein there is added in an amount of 0.01–10 parts by weight with respect to 100 parts by weight of said isotropic aqueous solution at least one compound selected from the group consisting of nonionic benzophenone derivatives and benzotriazole derivatives having solubility of 1 g or greater in the amphipathic substance at 20° C. and ionic benzophenone derivatives and benzotriazole derivatives with an ionic functional group bonded to the benzene ring via a chain portion and having solubility of 1 g or greater in water at 20° C.