Ars pictoria, or, An academy treating of drawing, painting, limning, and etching to which are added thirty copper plates expressing the choicest, nearest and most exact grounds and rules of symetry
Browne, Alexander, fl. 1660-1677.
A Rare secret to preserve Colours.
Take Rosemary water double distilled, and with a few drops of it, temper your shell of white, and you shall see it become instantly perfect white, however dead and faded it was before, besides this water allayes the Bubbles in white and umber, which are usually very troublesome in the grinding them.
