"Our translucent glow ink cannot be seen in daylight but glows green in the dark" it might glow under black light too Source: https://goodink.com/services/glow

"Our translucent glow ink cannot be seen in daylight but glows green in the dark" it might glow under black light too Source: https://goodink.com/services/glow/ https://goodink.com/services/glow/