Abstract: An analytical substrate including a substrate of which at least a first surface includes a dielectric or a semiconductor, and a metal film on the first surface of the substrate, and which includes protruding portions and protruding portions, in which the height of apex portions of the protruding portions is the height of a peak that is the greatest distance from the substrate in the surface height distribution of the metal film; the height of apex portions of the protruding portions is the height of a peak that is the next greatest distance from the substrate in the surface height distribution of the metal film; and the average value of the width of the protruding portions excluding groove regions, in which the height of the peak is the smallest distance from the substrate is at most equal to 200 nm.

Abstract: An ink jet recording material which enables the recorded ink images to exhibit enhanced light fastness, water resistance and hot moisture resistance, includes an ink receiving layer formed on a support material and containing a light fastness-enhancing agent containing hydroquinone-&bgr;-D-glucoside, a salt of pyrocatechol-3,5-disulfonic acid and/or salt of p-hydroxybenzenesulfonic acid, and an inorganic pigment and a cationic polymeric material which are in the form of a plurality of composite particles prepared by mixing an aqueous dispersion of inorganic pigment particles with a cationic polymeric material having a molecular weight of 100,000 or more, 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

Abstract: An ink jet recording material having excellent smoothness and gloss and capable of recording thereon ink images having high color density clarity, water resistance and sharpness comparative to the silver salt photographic images has a recording stratum formed on a substrate and comprising a single ink receiving layer or a plurality of ink receiving layers superposed on each other and containing a pigment and a binder, at least one ink receiving layer containing fine particles of at least one pigment selected from silica, aluminosilicate, and &agr;-, &thgr;-, &dgr;- and &ggr;-aluminas and having an average particle size of 1 &mgr;m or less and optionally a light resistance-enhancing agent for images including at least one of phenolic compounds, boric acid, borate salts and cyclodextrin compounds.

Abstract: An ink jet recording material which enables the recorded ink images to exhibit enhanced light fastness, water resistance and hot moisture resistance, includes an ink receiving layer formed on a support material and containing a light fastness-enhancing agent containing hydroquinone-&bgr;-D-glucoside, a salt of pyrocatechol-3,5-disulfonic acid and/or salt of p-hydroxybenzenesulfonic acid, and an inorganic pigment and a cationic polymeric material which are in the form of a plurality of composite particles prepared by mixing an aqueous dispersion of inorganic pigment particles with a cationic polymeric material having a molecular weight of 100,000 or more, 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

Abstract: An ink jet recording material having excellent smoothness and gloss and capable of recording thereon ink images having high color density clarity, water resistance and sharpness comparative to the silver salt photographic images has a recording stratum formed on a substrate and comprising a single ink receiving layer or a plurality of ink receiving layers superposed on each other and containing a pigment and a binder, at least one ink receiving layer containing fine particles of at least one pigment selected from silica, aluminosilicate, and &agr;-, &thgr;-, &dgr;- and &ggr;-aluminas and having an average particle size of 1 &mgr;m or less and optionally a light resistance-enhancing agent for images including at least one of phenolic compounds, boric acid, borate salts and cyclodextrin compounds.

Abstract: An ink jet recording material having substantially no tackiness and capable of receiving thereon ink images having high resistance to cracking and blotting has an ink receiving layer formed on a support and including (A) hydroxypropylmethyl cellulose having a 2% aqueous solution viscosity of 200 cP at 20° C., and optionally (B) a N-vinyl pyrrolidon polymer and (C) a cationic resin.