Candle jars made of glass are usually made of high borosilicate glass, which is fired at a high temperature of more than 600 degrees. It is a new type of environmentally friendly candle jars, which is more and more popular. For ingredients, according to the designed bill of materials, various raw materials are weighed and mixed evenly in a mixer. The main raw materials of glass are: quartz sand, limestone, feldspar, soda ash, boric acid, etc.
In melting, the prepared raw materials are heated at high temperature to form a uniform glass liquid without bubbles. Glass first transforms from a viscous liquid state to a plastic state and then to a brittle solid state. Forming methods can be divided into two categories: artificial forming and mechanical forming. Because of the high labor intensity, high temperature and poor conditions of artificial forming, most of them have been replaced by mechanical forming except for free forming. Mechanical forming, pressing, blowing, drawing and other processes. Enter annealing. Glass undergoes drastic temperature and shape changes during forming, which leave thermal stresses in the glass. This thermal stress reduces the strength and thermal stability of the glass article. Finally, there is the post-processing link, such as the familiar matte white candle jars wholesale, the surface needs to be frosted and matte. Mass produced candle jars are great for wholesale.
