Nowadays, glass can be seen everywhere. With the development of glass industry technology, new types of glass such as colored glass have emerged. The glass business is booming and the technology is constantly being updated. So how was the glass made before? The manufacture of glass requires some raw materials, mainly some glass forming bodies, adjustments, intermediates, etc., as well as some related auxiliary materials. The main raw materials also need to have oxidizing substances other than oxides, intermediates and networks, and the auxiliary materials are materials such as oxidizing agents, coloring agents and reducing agents. The production process of glass is as follows: First of all, it is necessary to pre-process the raw materials, pulverize the raw materials, and then carry out the relevant treatment after drying; then, the auxiliary materials of the glass are heated to make them uniform; then the glass is formed into a liquid state. The glass is made into a shaped product; finally, a heat treatment is performed to remove some crystallization stress inside the glass. These are the production processes of glass and its related information. Now we can see that there are a lot of colored glass, stained glass, mosaic glass, and the technology of glass has been greatly improved. Stained glass is produced by light absorption caused by excessive metal ions dissolved in glass or electronic transition of rare earth metal ions. After adding mixed pigment to glass solution or baking the pigment onto glass surface, it can be Formed a colored glass. Stained glass has been in existence since ancient times. The source may be the Near East. Stained glass is an art that emerged in the 10th century. The most complete and oldest stained glass that can be traced back to the early 12th century, it is The window of the cathedral in Augsburg, Germany, with a map of the prophet. The early windows were all simple portraits of people, and the colors were generally bright. In the 12th century, after the windows became larger, images of narratives were introduced. In the late 14th century, Jean Cassin created silver stains. Glass painting, the variety of colors has become more and more. Stained glass has become weaker in the Renaissance. In the past, brightly colored translucent and two-dimensional patterns were no longer popular. The realistic setting set by perspective and enamel color replaced the stained glass art. However, in the 20th century, architects designed glass curtain walls, which allowed the stained glass windows to re-emerge. Solar Street Lamp,Solar Street Light,Solar Led Street Light,Solar Panel Street Light Guangdong Smart Street Lighting Co., Ltd , https://www.gdfldlight.com