- Blue cobalt glass is a special fire viewing glass, mainly used in chemical laboratories to observe fire through flame reaction, and plays a role of filtration and protection.
- The production process of blue cobalt glass is special. Special glass made by adding " " (the main component is cobalt metaaluminate: Co(AlO2)2) during the production process.
- It is also used in many places in industry (such as steel plants, cement plants, industrial kilns). Adding gives the glass a color, so it is named blue cobalt glass.
- When observing the flame reaction of , you need to use blue cobalt glass, because the compound is not pure and is often mixed with some impurities, such as sodium (difficult to separate).
- The fine workmanship and creative appearance of this fire viewing glass ensure its popularity and practicality. Generally used in laboratories or steel plants, industrial cement production and other high-temperature furnace mouths.