| 摘要 |
PROBLEM TO BE SOLVED: To provide a golf ball which achieves satisfactory distances both on shots with drivers and on shots with middle irons used by professional golfers and skilled amateurs, and which also has excellent durability to cracking when repeatedly struck.SOLUTION: The invention provides a golf ball having a core and a cover of at least one layer. The core has a cross-sectional hardness which, letting (H) be a JIS-C hardness at a position 14 mm in from a surface toward a center of the core, (H) be a JIS-C hardness at a position 8 mm in from the surface toward the center of the core, (H) be a JIS-C hardness at a position 6 mm in from the surface toward the center of the core, and (H) be a JIS-C hardness at a position 4 mm in from the surface toward the center of the core, satisfies the formulas (1) H<70, (2) H<72, (3) H<75, and (4) H-H>8. The golf ball achieves in particular satisfactory distances, both on shots with drivers and on shots with middle irons such as a number six iron (I#6) used by professional golfers and skilled amateurs, and also exhibits an improved durability to cracking when repeatedly struck. |
