| 摘要 |
In this method for producing a glass substrate for an information recording medium, the first grinding step comprises a step for grinding the principal surfaces (2, 3) by blasting the principal surfaces (2, 3) with particles (200g) such that the arithmetic mean roughness Ra1 of the respective principal surfaces (2, 3) is kept within the range of from 1 µm to 5 µm, and the arithmetic mean roughness Ra2 in a case where the cutoff value is set between 2.5 µm and 80 µm falls within the range of from 0.1 µm to 1.0 µm. |
