Colored glasses and process of manufacture

Claim 2

IN A PROCESS OF MAKING COLORED GLASS, THE STEPS OF MELTING UNDER OXIDIZING CONDITIONS IN A FURNACE HAVING A FOREHEARTH, A BATCH OF GLASS-FORMING INGREDIENTS INCLUDING COLOR-FORMING MATERIALS THAT ARE COLORLESS UNDER OXIDIZING CONDITIONS, BUT PRODUCE COLOR WHEN PRESENT IN MOLTEN GLASS UNDER REDUCED CONDITIONS, FLOWING THE MOLTEN COLORLESS BASE GLASS INTO THE FOREHEARTH, MAINTAINING THE ATMOSPHERE OF THE FOREHEARTH UNDER REDUCING GASEOUS CONDITIONS TO CONVERT THE SURFACE OF THE MOLTEN GLASS FROM AN OXIDIZED STATE TO A REDUCED STATE AND THEREBY CONVERT SAID SURFACE TO A COLORED GLASS, ADDING A COLORANT TO THE MOLTEN GLASS IN THE FOREHEARTH, THE COLORANT CONTAINING COLOR-FORMING INGREDIENTS THAT ARE COMPATIBLE WITH THE BASE GLASS UNDER THE FOREHEARTH REDUCING CONDITIONS, FUSING THE COLORANT INTO THE BASE GLASS AND ADMIXING THE FUSED COLORANT AND THE BASE GLASS TO PRODUCE A UNIFORMLY COLORED COMPOSITE GLASS, ISSUING THE COMPOSITE GLASS FROM THE FOREHEARTH, AND FORMING AN ARTICLE FROM THE COMOSITE GLASS TO THEREBY YIELD AN ARTICLE HAVING DIFFERENT COLOR INTENSITY FROM THE BASE GLASS.