Patent ID: 8677782

Claim:
A method of making soda-lime-silica based glass, the method comprising: providing glass raw materials including sodium, silica, and calcium in a furnace to form a glass melt; pre-annealing a glass strip formed from the glass melt at a temperature of 500-550 degrees C. in order to alter its coefficient of thermal expansion (CTE); forwarding the pre-annealed glass strip to an annealing lehr where the glass strip is annealed; and treating at least a first major surface of the pre-annealed glass strip with aluminum chloride, at or just prior to the annealing lehr, when the glass strip is at a temperature(s) of from about 580 degrees C. to 850 degrees C., in order to make the soda-lime-silica based glass from the pre-annealed glass strip, the annealing lehr supporting an environment having an excess of oxygen.