MANUFACTURING METHOD OF DISPERSIBLE NICKEL FINE PARTICLE SLURRY

PROBLEM TO BE SOLVED: To provide a dispersible nickel fine particle slurry which can disperse metallic nickel fine particles effectively.SOLUTION: A manufacturing method of a dispersible nickel fine particle slurry comprises: A) a step of providing a slurry containing a material metallic nickel fine particle coated at least partially with a primary amine and elemental sulfur or a sulfur-containing compound, and an organic solvent; B) a step of adding a phthalocyanine compound to the slurry and coating the surface of the material metallic nickel fine particle with the phthalocyanine compound by replacing at least a part of the primary amine with the phthalocyanine compound; and C) a step of adding a polyoxyethylene alkyl ether carboxylic acid or a salt thereof to the metal nickel fine particle coated with the phthalocyanine compound, and forming a carboxylate with the phthalocyanine compound.