Methods for manufacturing molded glass object and upper mold

A method for manufacturing a molded glass object, the method comprising:

• forming an under layer on a surface of a base of an upper mold, the under layer having the property of a first intrinsic etching rate when the under layer is subjected to an etching process;
• forming a surface layer as a molding surface on the under layer, the surface layer having the property of a second intrinsic etching rate when the surface layer is subjected to the etching process;
• the first intrinsic etching rate being smaller than the second intrinsic etching rate;
• roughening a surface of the surface layer by carrying out the etching process for the surface,
• wherein the under layer prevents the base of the upper mold from being influenced by the etching;
• with respect to a lower mold having a molding surface formed without undergoing a roughening process, dropping a molten glass drop onto the molding surface of the lower mold from a dropping nozzle connected to a melting bath in which molten glass is stored, the dropping nozzle being arranged over and apart from the lower mold;
• and
• press-molding the dropped molten glass drop between the lower mold and the upper mold facing the lower mold.