The glass is an inorganic, homogeneous and amorphous substance obtained by cooling a melted silica-based mass. It is also one of the most surprising discoveries of man, for his history is full of mysteries. Although historians do not have accurate data on their origin, glass objects had been discovered in Egyptian necropolises, so the glass is thought to have been known for at least 4,000 years before the Christian Era. Some authors point to Phoenician navigators as the precursors of the glass i