Powder coating is a kind of 100% solids coating, which has the characteristics of solvent-free, pollution-free, energy and resource-saving, low labor intensity and high mechanical strength of coating film. Since the world's first oil crisis in 1973, the powder coating industry has been developing rapidly, by 1980, the world's powder coating production has exceeded 74kt, 290kt in 1990, 520kt in 1995, and reached 700kt in 1999. The total sales revenue of powder coatings is expected to reach 5.78 billion US dollars by 2005. (At present, the fastest growth rate of powder coatings is 7% in the Asia-Pacific region.

Most of the artificially made luminous balls are made of fluorescent powder (commonly known as glow powder), which is divided into two categories: photoglow storage powder and luminous powder with radioactivity. Photoglow storage luminous powder is phosphor in the environment after natural light, daylight, ultraviolet light, etc., the light energy stored, after the cessation of light irradiation, in the slow release of fluorescence, so at night or in the dark, can still see the luminous, the duration of a few hours to a dozen hours.

There are mainly 3 categories of phosphors for lamps. The first category is used for ordinary fluorescent lamps and low-pressure mercury lamps, the second category is used for high-pressure mercury lamps and self-ballasted fluorescent lamps, and the third category is used for ultraviolet light sources, etc. There are many types of phosphors, and the price is different, phosphors have good thermal stability, safety and environmental protection, for a variety of white light, can be adjusted to different red, blue, yellow and so on the color.

There are mainly 3 categories of phosphors for lamps. The first category is used for ordinary fluorescent lamps and low-pressure mercury lamps, the second category is used for high-pressure mercury lamps and self-ballasted fluorescent lamps, and the third category is used for ultraviolet light sources, etc. There are many types of phosphors, and the price is different, phosphors have good thermal stability, safety and environmental protection, for a variety of white light, can be adjusted to different red, blue, yellow and so on the color.