It is difficult to imagine a world without glass? Glass entered all types of human activity. It is strange why about such a widespread material, with more than 5 thousand. history, consumers know very little. The glass was opened by accident. Once upon a time, on the banks of the River, Phoenician merchants overlaid the fire instead of stones with pieces of soda brought from Africa, in the morning they saw solid transparent ingots resembling a huge crystal. The manufacture of glass has not changed since then. This is a rafting of the Potash and sand, which lowers the melting temperature of the quartz.
