Thought of using the glowing effect to create contrast!

More options...

Glow in the Dark Powder
Ultra Violet Light Reactive Powder
Thermo Chromic Inks
Sunlight Reactive Inks
Glow in the Dark Paint
Glow in the Dark Sticker / Board
Glow in the Dark Photo Paper
Glow in the Dark Signages
Glow in the Dark Thread / Fabric
Glow in the Dark Ropes
Glow in the Dark Ceramic Glaze
Glow Plastic Pellets and Pebbles
UV Light Sensitive Powder
UV Light Sensitive Paint and Ink