TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Properties: The silver powder has average particle diameter of 0.1-1 mu m measured by laser diffractometry and maximum particle size of 4 mu m or less. Preferred Component: The salt of fatty acid salt is chosen from lithium, sodium, potassium, barium, magnesium, calcium, aluminum, iron, cobalt, manganese, lead, zinc, tin, strontium, zirconium, silver and copper.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Component: The fatty acid is chosen from propionic acid, caprylic acid, lauric acid, myristic acid, palmitic acid, stearic acid, behenic acid, acrylic acid, oleic acid, linoleic acid and arachidonic acid, preferably oleic acid or stearic acid. The fatty acid ester is chosen from sorbitan fatty acid ester, sucrose fatty acid ester, glycerine fatty acid ester, ethylene fatty acid ester, propylene glycol fatty acid ester, polyoxyethylene fatty acid ester, polyoxyethylene sorbitan fatty acid ester, polyoxyethylene sorbitol fatty acid ester and polyoxyethylene lanolin fatty acid ester, preferably sorbitan fatty acid ester. The chelating agent is chosen from imidazole, oxazole, thiazole, selenazole, pyrazole, isoxazole, isothiazole, 1H-1,2,3-triazole, 2H-1,2,3-triazole, 1H-1,2,4-triazole, 4H-1,2,4-triazole, 1,2,3-oxadiazole, 1,2,4-oxadiazole, 1,2,5-oxadiazole, 1,3,4-oxadiazole, 1,2,3-thiadiazole, 1,2,4-thiadiazole, 1,2,5-thiadiazole, 1,3,4-thiadiazole, 1H-1,2,3,4-tetrazole, 1,2,3,4-oxa triazole, 1,2,3,4-thiatriazole, 2H-1,2,3,4-tetrazole, 1,2,3,5-oxatriazole, 1,2,3,5-thiatriazole, indazole, benzimidazole, benzotriazole, benzotriazole salt, oxalic acid, succinic acid, malonic acid, glutaric acid, adipic acid, pimelic acid, suberic acid, azelaic acid, sebacic acid, dodecane diacid, maleic acid, fumaric acid, phthalic acid, isophthalic acid, terephthalic acid, glycolic acid, lactic acid, hydroxybutyric acid, glyceric acid, tartaric acid, malic acid, tartronic acid, hydracrylic acid, mandelic acid, citric acid and ascorbic acid, preferably sodium salt of benzotriazole, benzotriazole or potassium salt of benzotriazole. The reducing agent is hydrazine or formalin.