ELECTROLESS CONVERSION GOLD-PLATING METHOD

摘要

PROBLEM TO BE SOLVED: To provide an electroless conversion gold-plating method which can form a uniformly gold-plated film at a constant deposition rate for a long term and greatly prolong the renewal time of a gold-plating solution. SOLUTION: The electroless conversion gold-plating method for plating gold on an article to be plated, which is dipped in the gold-plating solution including gold cyanide salt, is characterized by plating while controlling a content of free cyanide ion included in the gold-plating solution to a fixed quantity or less.