Firstly, we put both UV invisible Fluorescent pigment and Luminous pigment under UV light source (wavelength=365nm)

In the 2nd Step, we turn on UV light, and UV invisible Fluorescent pigment remit the light after absorbing UV light

Luminous pigment starts to absorb UV light and some color begin to glow color.

Luminous pigment continues absorbing UV light

When we turn off UV light, UV invisible Fluorescent pigment doesn't work without absorbing UV light, but our Luminous pigment already absorbs much UV light and glow very bright at the same time.

When we turn on UV light again, the UV invisible Fluorescent pigment works again