Multi-piece solid golf ball

A multi-piece solid golf ball comprising a solid core and a cover comprising an inner layer and an outer layer, the outer cover layer having a surface formed with a plurality of dimples, wherein

• a product of the Shore D hardness of said inner cover layer multiplied by the Shore D hardness of said outer cover layer and a proportion VR(%) of the total of the volumes of dimple spaces each defined below a plane circumscribed by the dimple edge to the overall volume of a phantom sphere given on the assumption that the golf ball surface is free of dimples satisfy any one of the following combinations (1) to (5):
• (1) the product of Shore D hardnesses of inner and outer cover layers:
• 1,500 to less than 2,000
• VR:
• 0.80 to 0.95%
• (2) the product of Shore D hardnesses of inner and outer cover layers:
• 2,000 to less than 2,500
• VR:
• 0.75 to 0.95%
• (3) the product of Shore D hardnesses of inner and outer cover layers:
• 2,500 to less than 3,000
• VR:
• 0.70 to 0.95%
• (4) the product of Shore D hardnesses of inner and outer cover layers:
• 3,000 to less than 3,500
• VR:
• 0.65 to 0.95%
• (5) the product of Shore D hardnesses of inner and outer cover layers:
• 3,500 to 4,000
• VR:
• 0.60 to 0.90%,
• and said dimples include at least three types of dimples which are different in at least one of a diameter, a depth, and a value V0 which is the volume of one dimple space defined below a plane circumscribed by the dimple edge divided by the volume of a cylinder whose bottom is the plane and whose height is the maximum depth of the dimple from the bottom, wherein the dimples of the smallest type have the diameter of 2.0 to 3.7 mm, the depth of 0.08 to 0.23 mm and the V0 value of 0.38 to 0.55, and their number is 1 to 40% of the total dimple number.

A multi-piece solid golf ball comprising a solid core and a cover comprising an inner layer and an outer layer, the outer cover layer having a surface formed with a plurality of dimples, wherein

• a product of the Shore D hardness of said inner cover layer multiplied by the Shore D hardness of said outer cover layer and a proportion VR (%) of the total of the volumes of dimple spaces each defined below a plane circumscribed by the dimple edge to the overall volume of a phantom sphere given on the assumption that the golf ball surface is free of dimples satisfy any one of the following combinations (1) to (3):
• (1) the product of Shore D hardnesses of inner and outer cover layers:
• 1,500 to less than 2,000
• VR:
• 0.80 to 0.95%
• (2) the product of Shore D hardnesses of inner and outer cover layers:
• 2,000 to less than 2,500
• VR:
• 0.75 to 0.95%
• (3) the product of Shore D hardnesses of inner and outer cover layers:
• 3,500 to 4,000
• VR:
• 0.60 to 0.90%,
• and said dimples include at least three types of dimples which are different in at least one of a diameter, a depth, and a value V0 which is the volume of one dimple space defined below a plane circumscribed by the dimple edge divided by the volume of a cylinder whose bottom is the plane and whose height is the maximum depth of the dimple from the bottom, wherein the dimples of the largest type have the diameter of 3.7 to 4.5 mm, the depth of 0.15 to 0.25 mm and the V0 value of 0.38 to 0.55, and their number is 5 to 80% of the total dimple number.

A multi-piece solid golf ball comprising a solid core and a cover comprising an inner layer and an outer layer, the outer cover layer having a surface formed with a plurality of dimples, wherein

• a product of the Shore D hardness of said inner cover layer multiplied by the Shore D hardness of said outer cover layer and a proportion VR(%) of the total of the volumes of dimple spaces each defined below a plane circumscribed by the dimple edge to the overall volume of a phantom sphere given on the assumption that the golf ball surface is free of dimples satisfy any one of the following combinations (1) to (3):
• (1) the product of Shore D hardnesses of inner and outer cover layers:
• 1,500 to less than 2,000
• VR:
• 0.80 to 0.95%
• (2) the product of Shore D hardnesses of inner and outer cover layers:
• 2,000 to less than 2,500
• VR:
• 0.75 to 0.95%
• (3) the product of Shore D hardnesses of inner and outer cover layers:
• 3,500 to 4,000
• VR:
• 0.60 to 0.90%,
• and said dimples include at least three types of dimples which are different in at least one of a diameter, a depth, and a value V0 which is the volume of one dimple space defined below a plane circumscribed by the dimple edge divided by the volume of a cylinder whose bottom is the plane and whose height is the maximum depth of the dimple from the bottom, wherein the dimples of the smallest type have the diameter of 2.0 to 3.7 mm, the depth of 0.08 to 0.23 mm and the V0 value of 0.38 to 0.55, and their number is 1 to 40% of the total dimple number.