PROCESS FOR PRODUCING GLASS

摘要

A process for producing a glass which comprises: preparing a raw glass batch containing an antimony compound having penta-valent antimony and an oxidizing agent (cerium oxide, a sulfuric acid salt, or a nitric acid salt) so as to produce a satisfactory clarifying effect; and melting the raw glass batch. In preparing the raw glass batch, it is preferred that the antimony compound is premixed with the oxidizing agent. When a nitric acid salt is used as the oxidizing agent, the raw glass batch is prepared so as to contain the antimony compound in an amount of 0.5-3 parts by mass, excluding 0.5 parts by mass, in terms of antimony pentoxide amount per 100 parts by mass of the basic glass composition expressed in terms of oxide amount.