Solar discoloration ink

Product brief introduction:
solar discoloration ink can absorb visible light to excite the object itself's lighten material. It is colorless and glows visable light when exposed to sunlight and long wave ultraviolet light and restore colorless after evacuating the light source.

Color:
colorless-purple, colorless-red, colorless-yellow,colorless-blue

Printing way:
offset, silk-screen, gravure.