| 摘要 |
PROBLEM TO BE SOLVED: To provide a golf ball having a small driver spin amount and traveling a great flight distance.SOLUTION: This golf ball is a spherical body formed of a rubber composition including (a) a base rubber, (b) a co-crosslinking agent, (c) a crosslinking initiator, and (d) hardening agent-containing microcapsules. The golf ball has, as a constituent element, the spherical body wherein the hardness difference between a surface hardness and a central hardness is not less than 26 in JIS-C hardness, and wherein the hardness difference between the surface hardness and a hardness at a point 10 mm distant from the surface is not less than 15 in JIS-C hardness. |
