How Does it Work?
We’re all familiar with fluorescent dyes like those used in highlighter pens. These dyes look bright because they take in light of a variety of colours and then transmit it back as a single colour. For example, a green highlighter’s ink absorbs the white light which hits it and shines it all back as an intense green colour.
Glow in the dark products take this one step further. They use very clever chemicals which absorb and store the energy from light, then emit it steadily over minutes or even hours. The process has the catchy name of “Phosphorescence”. Usually the light given off is an eerie whitish green glow. Dyes can be added to create other colours, but they won’t be as bright as the whitish green.