Abstract: A golf ball includes a core, a mid layer, and a cover. The core includes an inner core, a mid core, and an outer core. The mid layer includes an inner mid layer and an outer mid layer. A hardness H(C) is equal to or greater than a hardness H(B). A hardness H(E) is equal to or greater than a hardness H(D). An angle ? is calculated by (Formula 1). An angle ? is calculated by (Formula 2). The angle ? is 0° or greater. A difference (???) is 0° or greater. A hardness Hm2 of the outer mid layer is greater than a hardness Hm1 of the inner mid layer.

Abstract: A golf ball 2 includes a core 4, a first mid layer 10, a second mid layer 12, a third mid layer 14, and a cover 8. A volume Vinm and a Shore D hardness Hinm of the first mid layer, a volume Vm and a Shore D hardness Hm of the second mid layer, a volume Voum and a Shore D hardness Houm of the third mid layer, a volume Vc and a Shore D hardness Hc of the cover, and a volume V of an entirety of the ball meet: (a) Hinm<Hm>Houm>Hc, (b) Vinm<Vm>Voum>Vc, (c) Hm?Hc>25, (d) (Vinm+Vm+Voum+Vc)/V<0.40, (e) Vm/Vc>1.50, and (f) (Vm*Hm)/(Vc*Hc)>3.0.

Abstract: A golf ball includes a spherical core and a cover. The core includes an inner core, a mid core, and an outer core. A hardness H(C) is equal to or greater than a hardness H(B). A hardness H(E) is equal to or greater than a hardness H(D). An angle ? is calculated by (Formula 1) from a thickness Y (mm) of the mid core, the hardness H(C), and the hardness H(D). An angle ? is calculated by (Formula 2) from a thickness Z (mm) of the outer core, the hardness H(E), and the hardness H(F). Each of the angle ? and a difference (???) between the angles ? and ? is equal to or greater than 0°. The golf ball has excellent flight performance upon a shot with a driver.

Abstract: A golf ball 2 includes a core 4, a mid layer 6, a reinforcing layer 8, and a cover 10. A hardness Hm of the mid layer 6 is greater than a hardness Hc of the cover 10. A difference (Hm?Hc) is greater than 28. A hardness Hs2 at a surface of a sphere consisting of the core 4 and the mid layer 6 is greater than a hardness Hs3 at a surface of the golf ball 2. A difference (Hs2?Hs3) is less than 5. A thickness Tm of the mid layer 6 is larger than a thickness Tc of the cover 10. A ratio (Tm/Tc) is greater than 3.0 and less than 5.0. A diameter of the core 4 is equal to or greater than 38.2 mm. The hardness Hc of the cover 10 is equal to or less than 37.

Abstract: A golf ball includes a core, a cover covering the core, and a clear layer covering the cover. The cover has dimples and a land. An xy coordinate of a hue of an outermost layer in the core excluding a colorless and transparent layer is included in any one of eight zones I to VIII. An xy coordinate of a hue of the cover is included in any one of the eight zones I to VIII which is different from and is not adjacent to the zone in which the xy coordinate of the hue of the outermost layer is included. A ratio (T1/T2) of a thickness T1 of the cover immediately below a deepest portion of each dimple and a thickness T2 of the cover immediately below the land is equal to or greater than 0.50 but equal to or less than 0.80.

Abstract: A golf ball 2 includes a core 4, a mid layer 6 positioned outside the core 4, a reinforcing layer 8 positioned outside the mid layer 6, and a cover 10 positioned outside the reinforcing layer 8. The difference between: a JIS-C hardness H(5.0) and a JIS-C hardness Ho at the central point is 6.0 or greater. The difference between: a JIS-C hardness H(12.5) and the hardness H(5.0) is 4.0 or less. The difference between a JIS-C hardness Hs at the surface of the core 4 and the hardness H(12.5) is 10.0 or greater. The difference between the hardness Hs and the hardness Ho is 22.0 or greater. In the golf ball 2, there is no zone in which a hardness decreases from the central point toward the surface. A hardness H2 of the mid layer 6 is greater than a hardness H3 of the cover 10.

Abstract: A golf ball 2 includes a core 4, a mid layer 6, a reinforcing layer 8, an inner cover 10, and an outer cover 12. The core 4 includes a center 18 and an envelope layer 20. The envelope layer 20 is formed by a rubber composition being crosslinked. The rubber composition includes a base rubber, a co-crosslinking agent, a crosslinking initiator, and an acid and/or a salt. The co-crosslinking agent is (1) an ?,?-unsaturated carboxylic acid having 3 to 8 carbon atoms; and/or (2) a metal salt of an ?,?-unsaturated carboxylic acid having 3 to 8 carbon atoms. A hardness Hc1 of the inner cover is greater than a hardness Hc2 of the outer cover. A thickness T1 of the inner cover is equal to or greater than 0.1 mm but equal to or less than 0.8 mm.

Abstract: The present invention provides a golf ball comprising a spherical core composed of a spherical inner core layer and an outer core layer, an intermediate layer and a cover, wherein the inner core layer has a hardness difference (Hs1-Ho) between a surface hardness (Hs1) and a center hardness (Ho) of 5 or less in JIS-C hardness, the outer core is such that R2 of a linearly approximated curve obtained from a least square method is 0.95 or higher, when JIS-C hardness, measured at nine points obtained by dividing a thickness of the outer core in a radius direction of the spherical core into equal parts having 12.5% intervals therebetween, is plotted against distance (%) from a border point between the outer core layer and the inner core layer, and the intermediate layer has a slab hardness which is greater than a slab hardness of the cover.

Abstract: A golf ball 2 includes a core 4, a first mid layer 6, a second mid layer 8, and a cover 12. The core 4 includes a center 18 and an envelope layer 20. The center 18 is formed by crosslinking a first rubber composition, and the envelope layer 20 is formed by crosslinking a second rubber composition. The first rubber composition or the second rubber composition includes a base rubber, a co-crosslinking agent, a crosslinking initiator, and an acid and/or a salt. The co-crosslinking agent is: (1) an ?,?-unsaturated carboxylic acid having 3 to 8 carbon atoms; and/or (2) a metal salt of an ?,?-unsaturated carboxylic acid having 3 to 8 carbon atoms. A hardness Hm2 of the second mid layer 8 is greater than a hardness Hm1 of the first mid layer 6. The hardness Hm2 is greater than a hardness Hc of the cover 12.

Abstract: The present invention provides a golf ball comprising a golf ball body with a spherical core having one or more layers, an intermediate layer disposed outside the spherical core and a cover disposed outside the intermediate layer and a paint film formed on a surface of the golf ball body, and having a friction coefficient calculated using a contact force tester of 0.35 or more and 0.60 or less, wherein the golf ball body has specific plurality of dimples on the surface thereof, at least one layer of the spherical core is a rubber layer having a specific hardness distribution, and the rubber layer has a hardness at the outermost point which is greater than a hardness at the innermost point, and the intermediate layer has a slab hardness (Hm) which is greater than a slab hardness (Hc) of the cover.

Abstract: A golf ball 2 includes a core 4, amid layer 6, and a cover 10. The core 4 includes a center 16, a first envelope layer 18, and a second envelope layer 20. The first envelope layer 18 is formed by a first rubber composition being crosslinked. The second envelope layer 20 is formed by a second rubber composition being crosslinked. The first rubber composition and/or the second rubber composition include: a base rubber; a co-crosslinking agent; a crosslinking initiator; and an acid and/or a salt. The co-crosslinking agent is (1) an ?,?-unsaturated carboxylic acid having 3 to 8 carbon atoms; and/or (2) a metal salt of an ?,?-unsaturated carboxylic acid having 3 to 8 carbon atoms.

Abstract: A golf ball 2 includes a spherical core 4, an inner mid layer 6, an outer mid layer 8, a reinforcing layer 10, and a cover 12. When distances (%) from a central point of the core 4 to nine points and JIS-C hardnesses at the nine points, which nine points are obtained by dividing a region from the central point of the core 4 to a surface of the core 4 at intervals of 12.5% of a radius of the core 4, are plotted in a graph, R2 of a linear approximation curve obtained by a least-square method is equal to or greater than 0.95. Hm1 is greater than Hm2. Hc is less than Hm1. T2 is equal to or greater than 0.5 mm but equal to or less than 1.6 mm.

Abstract: A golf ball 2 includes a core 4, a mid layer 6, a reinforcing layer 8, and a cover 10. A hardness Hm of the mid layer 6 is greater than a hardness Hc of the cover 10. A difference (Hm?Hc) is greater than 28. A hardness Hs2 at a surface of a sphere consisting of the core 4 and the mid layer 6 is greater than a hardness Hs3 at a surface of the golf ball 2. A difference (Hs2?Hs3) is less than 5. A thickness Tm of the mid layer 6 is larger than a thickness Tc of the cover 10. A ratio (Tm/Tc) is greater than 3.0 and less than 5.0. A diameter of the core 4 is equal to or greater than 38.2 mm. The hardness Hc of the cover 10 is equal to or less than 37.

Abstract: A golf ball includes a core, a cover covering the core, and a clear layer covering the cover. The cover has dimples and a land. An xy coordinate of a hue of an outermost layer in the core excluding a colorless and transparent layer is included in any one of eight zones I to VIII. An xy coordinate of a hue of the cover is included in any one of the eight zones I to VIII which is different from and is not adjacent to the zone in which the xy coordinate of the hue of the outermost layer is included. A ratio (T1/T2) of a thickness T1 of the cover immediately below a deepest portion of each dimple and a thickness T2 of the cover immediately below the land is equal to or greater than 0.50 but equal to or less than 0.80.

Abstract: A golf ball 2 includes a core 4, a mid layer 6, a reinforcing layer 8, and a cover 10. When distances (%) from the central point of the core 4 to nine points and JIS-C hardnesses at the nine points, which are obtained by dividing a region from the central point of the core 4 to the surface of the core 4 at intervals of 12.5% of the radius of the core 4, are plotted in a graph, R2 of a linear approximation curve obtained by a least-square method is equal to or greater than 0.95. The difference (H(100)?H(0)) between a JIS-C hardness H(100) at the surface of the core 4 and a JIS-C hardness H(0) at the central point of the core 4 is equal to or greater than 15.

Abstract: A golf ball 2 includes a core 4, amid layer 6 positioned outside the core 4, a reinforcing layer 8 positioned outside the mid layer 6, and a cover 10 positioned outside the reinforcing layer 8. The core 4 is obtained by a rubber composition being crosslinked. The rubber composition includes a base rubber, a co-crosslinking agent, a crosslinking initiator, and a carboxylate. The co-crosslinking agent is: (1) an ?,?-unsaturated carboxylic acid having 3 to 8 carbon atoms; and/or (2) a metal salt of an ?,?-unsaturated carboxylic acid having 3 to 8 carbon atoms. The amount of the carboxylate is equal to or greater than 1.0 parts by weight but less than 40 parts by weight per 100 parts by weight of the base rubber. A hardness of the mid layer 6 is greater than a hardness of the cover 10.

Abstract: A golf ball 2 includes a core 4, a mid layer 6 positioned outside the core 4, a reinforcing layer 8 positioned outside the mid layer 6, and a cover 10 positioned outside the reinforcing layer 8. The difference between: a JIS-C hardness H(5.0) and a JIS-C hardness Ho at the central point is 6.0 or greater. The difference between: a JIS-C hardness H(12.5) and the hardness H(5.0) is 4.0 or less. The difference between a JIS-C hardness Hs at the surface of the core 4 and the hardness H(12.5) is 10.0 or greater. The difference between the hardness Hs and the hardness Ho is 22.0 or greater. In the golf ball 2, there is no zone in which a hardness decreases from the central point toward the surface. A hardness H2 of the mid layer 6 is greater than a hardness H3 of the cover 10.

Abstract: An object of the present invention is to provide a golf ball having a high performance as well as the visibility and the fashionable appearance. The present invention provides a colored golf ball having a color other than white and comprising: a core having a center and at least one intermediate layer disposed around the center, and a cover disposed around the core, wherein the cover and at least one of the intermediate layer preferably contain a fluorescent dye and/or a fluorescent pigment.