Article 1028 of the "Fire Code for Building Design" stipulates that the evacuation aisles and main evacuation routes of the dance and entertainment venues, underground stores and the ground or the wall near the ground should be set up with luminous evacuation signs. The design of high-rise civil bui

In our daily life, people find that adding luminescent pigments to injection molding products can make them glow in the dark. In the early days, the production technology was not mature, and the finished products would have a high chance of blackening.

The phenomenon of fluorescence is a photoluminescence process. In this process, short-wavelength electromagnetic waves in the ultraviolet or visible wavelength band are absorbed and then released as long-wavelength electromagnetic waves. magnetic waves are absorbed and then released in the form of long-wavelength electromagnetic waves. The latter usually falls in the visible range and is superimposed with The latter usually falls in the visible range and is superimposed on the regular reflected light, thus revealing a dazzling glow color.

Covering powerWhen an object is coated with a certain paint, the ability of the pigment in the paint to cover the base color on the surface of the object to be coated, so that the base color can no longer be revealed through the paint.Covering power = pigment mass (g) / surface area of the object to