Brightness also has a great effect

In addition, the luminous powder expensive, its excessive use , will increase the cost of paint . Based on the above considerations,glow in dark sheet dosage of 10% to 20 % is appropriate.
Luminous powder particle size on luminous paint luminous intensity also has a great impact , if luminous powder particle size is too small , nanometer , when the relative content of Dy and Eu changes, or because of the small size effect of nanoparticles , glow in the dark dye emission brightness is reduced paint , not even light , only the white powder. But the luminous powder particle size can not be too large, to less than 50μm. Generally should be used in preparation of luminous paint luminous powder particle size control in l ~ 50μm range.