Patent ID: 7485406
Filing Date: 2009-02-03
Classification: C09D,Y10S

Abstract:
1. A photostorage solid drawing medium having a gel hardness of 2-50 kg/cm 2 which comprises 20-80% by weight of a solvent consisting essentially of water and a water-soluble organic solvent, 1-40% by weight of a resin soluble in the solvent, 2-40% by weight of at least one gelling agent selected from the group consisting of an aliphatic carboxylic acid, its salt, N-fatty acid acylamino acid and its salt, and 5.0-50.0% by weight of a photostorage pigment, each based on the weight of the photostorage solid drawing medium, wherein the photostorage pigment comprises a long afterglow fluorescent substance comprising an alkaline earth aluminosilicate as a matrix activated with a rare earth element wherein the alkaline earth element is at least one selected from the group consisting of strontium, calcium, magnesium and barium.