Patent ID: 6713160
Filing Date: 2004-03-30
Classification: B41M,Y10S,Y10T

Abstract:
An ink jet recording material comprising a support material and at least one ink receiving layer formed on at least one surface of the support material and comprising a light fastness-enhancing agent for ink images received on the ink receiving layer, and a plurality of composite particles prepared from an inorganic pigment and a cationic polymeric material,wherein(1) the light fastness-enhancing agent comprises at least one member selected from the group consisting of hydroquinone-&bgr;-D-glucoside, salts of pyrocatechol-3,5-disulfonic acid and salts of p-hydroxybenzenesulfonic acid; (2) the inorganic pigment comprises a plurality of secondary particles having an average particle size of 10 to 500 nm, each secondary particle comprising a plurality of primary particles having an average primary particle size of 3 to 40 nm, and agglomerated with each other to form secondary particle; (3) the cationic polymeric material has a molecular weight of 100,000 or more; and (4) the composite particles of the inorganic pigment particles and the cationic polymeric material are those prepared by mixing an agueous dispersion of inorganic pigment particles with a cationic polymeric material, to cause the aqueous dispersion of the inorganic pigment particles to be coagulated with the cationic polymeric material, and subjecting the resultant coagulate of the inorganic pigment with the cationic polymeric material to pulverization, to form inorganic pigment-cationic polymeric material composite particles having an average composite particle size of 10 to 1,000 nm.