Virus "liven up" inks.
Virus captures the solar energy an put it in a transparent  polychrome water-based ink.
A hocus pocus that, when exposed to light, reveals hidden messages, unexpected colors, latent drawings.

GEO AQUACHROME: chromatic  metamorphosis.
Aquachrome is a versatile and sensitive ink that makes a chromatic metamorphosis when exposed to light. Never the same, Aquachrome animates itself of dynamic reflexes: artworks and signs appear to light and disappear in the dark as real magic. 
Four transparent colors which, when overlapped, allow infinite colors simulating the tonal vastness of  four color printing.