If you want embeds to glow after a day's exposure to sunlight, use more than you initially would. It turned my soap into a nice spooky pale green, and in the dark you could just barely make out the glow. Also, I lost half of my mica trying to get the stuck lid open, so if I get this again I will ask them if they can please put my 4 oz order in a bag instead of a jar.
This is my go-to pigment for glow in the dark purposes. Everyone asks- does it really work? And yes, it really does!