Importance

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Abstract

[Problem] To provide a polishing sheet in which a hard material such as a metal product can be efficiently polished to form a smooth surface with low convexities and concavities, and to form a uniform smooth surface even when repeated polishing is performed on the same polishing surface. [Resolution Means] A polishing sheet includes a substrate, a plurality of three-dimensional elements that includes diamond abrasive particles and a bonding material, and forms a polishing surface, and an intermediate layer that is provided between the substrate and the three-dimensional element and bonds the substrate and the three-dimensional element N together, wherein a ratio C₂/C₁ of a content of the diamond abrasive particles C₂ to a content of the bonding material C₁ is 0.05 to 1.5 in terms of mass ratio.

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First Claim