Thermosol Glass Tuff, Toughened Glass, is processed by heating glass to its transition stage (610-650 degrees Celsius), and then cooling it rapidly with blasts of air through specially designed air nozzles. This gives the glass high surface stress and tensile strength and it becomes four to five times stronger than annealed glass of the same thickness.

Thermosol Glass Tuff, Toughened Glass, is processed by heating glass to its transition stage (610-650 degrees Celsius), and then cooling it rapidly with blasts of air through specially designed air nozzles. This gives the glass high surface stress and tensile strength and it becomes four to five times stronger than annealed glass of the same thickness.