The invention provides an improved golf ball printing method which is capable of efficient printing control in the production of golf balls and provides a colorful or lustrous mark on the ball surface. The printing method uses a two-component reacting ink comprising a resin having a hydroxyl group, an isocyanate, a coloring agent containing a metal, and a &bgr;-diketone. The ink ensures pot life more than eight hours and does not need to replace with newly prepared ink all day long.