More than 3,000 years ago, a European Phoenician merchant ship loaded with crystalline mineral "natural soda" sailed on the Beluce River off the Mediterranean coast. As the sea ebb, merchant ships stranded. So the crew have boarded the beach. Some seafarers also carried cauldrons, moved firewood, and used a few "natural soda" brackets to start cooking on the beach. After the crew had finished their meals, the tide began to rise. Suddenly someone shouted as they prepared to tidy up on board the boat, "Come and see, there are some bright, glittering things on the sand below the pot!" The crew brought these glittering things to Study carefully on board. They found that some of these shiny crystals stuck with quartz sand and melted natural soda. Originally, these flashing things were the natural soda they used to make the pot during cooking, and the crystals that were produced by the chemical reaction of the quartz sand on the beach under the influence of flame were the earliest glass. Later, the Phoenicians combined quartz sand with natural soda and melted in a special stove to make glass balls, which made the Phoenicians make a fortune. Around the fourth century, the Romans began to apply glass to windows and doors. By 1291, Italy's glassmaking technology has been very well developed. "Our glass making technology must not be leaked out and all the glass-making artisans are brought together to make glass!" In this way, the Italian glass craftsmen were sent to an isolated island to produce glass, They are not allowed to leave this island. In 1688, a man named Naf invented the process of making large pieces of glass, from which time the glass became an ordinary item. The glass we are using is made of quartz sand, soda ash, feldspar and limestone at high temperatures. Melt in the cooling process gradually increased viscosity obtained from the non-crystalline solid material. Sexually brittle and transparent. Quartz glass, silicate glass, soda-lime glass, fluoride glass. Usually refers to silicate glass, quartz sand, soda ash, feldspar and limestone as raw materials, after mixing, high temperature melting, homogenization, processing and forming, and then obtained by annealing. Widely used in construction, household, medical, chemical, electronics, instrumentation, nuclear engineering and other fields.