Fluorescent paints are frequently used for accident prevention signs, advertising boards capturing consumers' attention, and posters, etc.

Luminescence or florescence refers to the phenomenon where absorbed energy is converted into another form of energy to emit light including visible radiation when a material receives light energy from the outside.
Fluorescence is a form of light emission that occurs only while the external energy is being absorbed. When the external energy disappears, the light also goes out.

The fluorescent material used for fluorescent paint is an organic substance called daylight fluorescent pigment that is made by dyeing synthetic resin with fluorescent paint.
The fluorescent dye emits fluorescence light when the concentration of dye solution is low. As the concentration increases, the fluorescence intensity increases as well. However, the intensity will decline once it has reached at a certain concentration level.

Synthetic resins that are used as a carrier of the fluorescent dye are as follows: polymethacrylic acid ester, polyvinyl chloride, vinyl chloride-vinyl acetate copolymer, alkyd resin, aromatic sulfonamide resin, urea resin, benzoguanamine resin, polyamide resin, styrene resin, and their copolymers.
Examples of fluorescent dye are Brilliant Sulphoflavin FF and Fluorol Green Gold.

Fluorescent paint types are shown in [Table 1].
In recent years, the fluorescent dyes that are made up of glass powders (La₂O₃、ZnO、B₂O₃) and water-soluble binder (polyethylene oxide, hydroxyl cellulose, carboxymethyl cellulose, etc.) are available.

[Table 1] Type and Application of Fluorescent Paints