TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Process: The fine particle having the surface with at least the part coated with the polymer dispersing agent is obtained by: (a) reducing at least one type of a metal ion by an electrolytic reduction or an electroless reduction using a reducing agent in an aqueous solution in which the metal ion and a polymer dispersing agent (D) are dissolved, and forming a fine particle dispersion aqueous solution, where the fine particle (P) comprised of one type or not less than two types of the metal, the alloy, and the metallic compound, having the mean particle diameter of 1-150 nm for the primary particles, is dispersed with being coated by the polymer dispersing agent (D); and (b) separating and collecting the fine particle from the aqueous solution obtained at step (a) in which the fine particle (P) is dispersed. Preferred Components: The organic solvent (A) comprises N-methylacetamide, N-methylformamide, N-methylpropanamide, formamide, N,N-dimethylacetamide, 1,3-dimethyl-2-imidazolidinone, N,N-dimethylformamide, 1-methyl-2-pyrolidone, hexamethylphosphoric triamide, 2-pyrrolidinone, epsilon -caprolactam, and acetamide. The organic solvent (B) comprises an ether based compound of formula (R2-O-R2a) (B1), an alcohol compound of formula (R3-OH) (B2), a ketone based compound of formula (R4-C(=O)-R5) (B3), and an amine based compound of formula (R6-(N-R7)-R8) (B4). The organic solvent (B) is one of: the ether based compound (B1) comprising diethyl ether, methyl propyl ether, dipropyl ether, diisopropyl ether, methyl-tert-butyl ether, tert-amyl methyl ether, divinyl ether, ethyl vinyl ether, and aryl ether; the alcohol (B2) comprising methanol, ethanol, 1-propanol, 2-propanol, 2-butanol, and 2-methyl 2-propanol; the ketone based compound (B3) comprising acetone, methyl ethyl ketone, and diethyl ketone; or the amine based compound (B4) comprising triethylamine and/or diethylamine. The organic solvent (C) comprises ethylene glycol, diethylene glycol, 1,2-propanediol, 1,3-propanediol, 1,2-butanediol, 1,3-butanediol, 1,4-butanediol, 2-butene-1,4-diol, 2,3-butanediol, pentanediol, hexanediol, octanediol, glycerol, 1,1,1-trishydroxymethylethane, 2-ethyl-2-hydroxymethyl-1,3-propanediol, 1,2,6-hexanetriol, 1,2,3-hexanetriol, 1,2,4-butanetriol, threitol, erythritol, pentaerythritol, pentitol, and hexitol. The polymer dispersing agent (D) comprises polyvinylpyrrolidone, polyethyleneimine, polyacrylic acid, carboxymethylcellulose, polyacrylamide, polyvinyl alcohol, polyethylene oxide, starch, and gelatin. The metal comprises copper, silver, gold, nickel, cobalt, iron, zinc, tin, aluminum, bismuth, platinum, rhodium, palladium, ruthenium, manganese, chromium, vanadium, and titanium. The alloy is an alloy of the metals. The metallic compound is an oxide of the metal and the alloy.R2, R2a = 1-4C-alkyl;R3 = 1-4C-alkyl;R4, R5 = 1-2C-alkyl; andR6, R7, R8 = 0-2C-alkyl or H. EXAMPLE - 0.2 g of Cupric acetate was dissolved in 10 ml of aqua distillata. Then sodium borohydride was dissolved in the aqua distillata. Then 0.5 g of polymer dispersing agent e.g. polyvinylpyrrolidone was added and then agitated to obtain the fine particle dispersion.