[Hydrogen Time] decided to make a green phosphorescent material, and has shared the process on Youtube, embedded below. The aim is to produce zinc sulfide crystals doped with copper impurities.

Spoiler alert: almond butter isn’t phosphorescent. But powdered milk is, at least to the limit of detection of this homebrew phosphorescence detector. Why spend a bunch of time and money on such ...

There are many varieties among the forms of life that emit from their surfaces and various parts of their bodies a powerful luminosity, and are called phosphorescent. It has been supposed by some ...