| 摘要 |
An aspect of the invention is directed to a method for manufacturing a glass substrate for an information recording medium including: a polishing step of polishing a surface of a raw glass plate, with use of a polishing solution containing a polishing agent and water; and a chemically reinforcing step of reinforcing the polished surface of the raw glass plate which has undergone the polishing step, with use of a chemically reinforcing treatment solution. The polishing step is a step of using, as the polishing agent, a polishing agent containing CeO2, and of performing polishing in such a manner that the effective amount of CeO2 per unit area of the surface of the raw glass plate to be used in the polishing is in the range of from 0.05 to 0.5 mug/cm2.
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