"He who marches out of step hears another drum." ~ Ken Kesey
We use the Wilflex Phosphorescent, kinda clear looking top coating ink. Even though they say it won't work as well over dark colors, we've seen if you build it up thick, the crystals that are in it that actually glow still work over a darker ink. We have even printed it over a flashed scarlet red, 81 mesh 2 coats, that stuff glows like you wouldn't believe. Really cool stuff and glows for a long time!!!!
• Afterglow period of ten times current ZnS based phosphorescent pigments.• Activation by a wide wavelength band (200-450 nm) but best results are obtained with an activation energy under 350 nm;• Initial afterglow brightness of up to ten times that of conventional phosphorescent pigments;• Increase in luminescence and afterglow with longer activation time;• Excellent weather and light fastness;• Free of hazardous and radioactive substances.