History of glass
Real glassmaking began in the Middle East around 3500 BC. e. Archaeologists believe that the earliest pieces of glass made in ancient Egypt were blue glass beads.
Glass production in China started relatively late. Since people knew how to make glass during the Western Zhou Dynasty, glass was one of the most expensive materials along with gold and precious stones. Early glass was considered a luxury material, and the technology and method of making glass was also a very closely guarded technical secret that was once only available to the powerful.
Glass making process
Pulverizing quartz sand, soda ash, limestone, feldspar and other raw materials, drying wet raw materials, and removing iron from iron-containing raw materials to ensure glass quality.
Add the ingredients and then heat the above ingredients at a high temperature, usually 1550-1600 degrees, to form the liquid glass.
Then the desired shape is given to the liquid glass.
Finally, the final finished glass is formed by annealing, tempering and other processes.