Method for manufacturing substrate and method for manufacturing substrate for magnetic disk

A method for manufacturing a substrate, the method comprising

• processing a side face of a laminate, the laminate including a plurality of substrates that include the substrate and a sheet-shaped spacer disposed between adjacent substrates of the plurality of substrate, wherein the processing performed on the side face of the laminate includes:
• processing for bringing the laminate into a pressed state;
• first side face processing for processing a side face of the laminate in the pressed state;
• processing for releasing the laminate from the pressed state after performing the first side face processing;
• intermediate processing for performing one of dividing the laminate released from the pressed state into two or more laminates, combining the laminate released from the pressed state with another laminate in a stacking direction, and leaving the laminate released from the pressed state as it is;
• processing for bringing the laminate that has undergone the intermediate processing into a pressed state after performing the intermediate processing;
• and
• second side face processing for further processing a side face of the laminate that has undergone the intermediate processing and is in the pressed state.