Firstly, the mould must be designed, determined and manufactured. Quartz sand is the main raw material for glass, and other auxiliary materials melt into liquid at high temperature.
The glass bottle is formed by injecting mould, cooling, cutting and tempering. Glass bottles usually have rigid marks, which are also made of the shape of the mould. According to the manufacturing method, glass bottle can be divided into manual blowing, mechanical blowing and extrusion forming. Glass bottles can be divided into the following categories according to their composition: first, sodium glass, second, lead glass and third, borosilicate glass.
The main raw materials glass bottles are natural ore, quartz stone, caustic soda, limestone and so on. The glass bottle has a high degree of transparency and corrosion resistance, it will not change the material properties in contact with most chemicals. It is characterized by simple manufacturing process, free and changeable modeling, high hardness, heat resistance, clean, easy cleaning, and can be used repeatedly. As packaging materials, glass bottles are mainly used in food, oil, alcohol, beverages, condiments, cosmetics and liquid chemical products. But the glass bottle also has its shortcoming, for example the weight is big, the transportation storage cost is high, is not able to bear the impact and so on.
Nowadays glass bottle/jar can be made into a variety of shapes, and coating, printing, etc… more and more modern technologies are adopted. For example, frosting, coating, printing, hot stamping, pad printing, thermal transfer…etc., make bottle/jar more beautiful.