A brief history of violet: storiedcolors.com/color/cobalt...
"All of them, like the original 1859 pigment, are expensive."
Unlike the arsenic version, though, this Violet's brush is safe to lick. 😏
The first stable violet artists could buy, available in two forms from the 1850s: a dark cobalt phosphate first described by Salvétat in 1859, and a brighter but highly toxic cobalt arsenate developed...
