Glass manufacturing process

A process for manufacturing glass comprising:

• providing a glass batch comprising a mixture of solid glass-forming materials and being free of chemical refining agents;
• melting the glass batch in a melting chamber via application of heat from one or more submerged combustion burners to produce a volume of unrefined molten glass comprising, by volume, 20% to 40% gas bubbles;
• directing the unrefined molten glass from the melting chamber into a treatment chamber including a refining section and a color control section located downstream of the refining section;
• introducing a refining agent directly into the unrefined molten glass at a location between outside of the melting chamber and outside of the color control section to promote gas bubble removal from the unrefined molten glass;
• heating the unrefined molten glass including the refining agent in the refining section of the treatment chamber at a temperature in the range of 1200° C. to 1500° C. to produce a volume of refined molten glass, the refined molten glass comprising, by volume, fewer gas bubbles than the unrefined molten glass;
• introducing a colorant material into the refined molten glass from the refining section in the color control section of the treatment chamber to produce a volume of refined molten glass having a final desired color;
• and then
• forming glass articles from the refined molten glass.