Nickel electroplating bath for satin finish and method

An acidic nickel electroplating emulsion bath composition for obtaining a uniform satin-finish nickel plate surface on the material plated which comprises

• 1. a sufficient amount of a water soluble nickel salt to obtain in said bath nickel in the amount of 30 to 150 gm/1
• 2. a polyamide resin dissolved in a low molecular weight alcohol having 1 to 3 carbon atoms and being present in the amount of 1 to 10,000 ppm
• wherein said resin is a member selected from the group consisting of
• a. a copolymer of a dimer acid of an unsaturated fatty acid and an aliphatic amine having the formula ##STR11## wherein R represents the residual radical of the dimer unsaturated acid containing 14 to 46 carbon atoms, one of n.sub.1 and n.sub.2 = 0 to 5 and the other of n.sub.1 and n.sub.2 = 1 to 5, and n' = 1 to 13,
• b. a copolymerized nylon of a copolymer of at least two homo-nylons defined by a number n from 5 to 11 in the following formula;
• ##STR12## and defined by a number n.sub.1, from 2 to 12 and n.sub.2 from 4 to 12 in the following formula;
• ##STR13## c. a modified nylon containing the following unit in the molecule;
• ##STR14##
• wherein R represents methyl or ethyl, n=1 to 5 and m=5 to 11. 3. a polishing agent in an amount of 0.1-30g/1 of said bath selected from the group consisting of alkali metal salts of aromatic sulfonic acid, aromatic sulfonamide, aromatic sulfonimide, alkali metal salts of aromatic sulfonamide, and alkali metal salts of aromatic sulfonimide.