Of this colour there are two sort at the colour-shop, the one called ceruss, which is the most pure and clean part; the other is called by the plain name of white-lead: they are colours that work with very such ease, and will be ground as thus reduced the undermost superficies of the lead in this white calx, which proves a very good white, but in my opinion, not exceeding the best ceruss, which is as white as the other, and a great deal cheaper.