Divers painter there are, who having haste of work, do use to temper their colours with one part of fat oyl, and two of common linseed oyl, and by this meanes they make the colours dry the sooner: this fat oyl is only linseed oyl exposed to the weather, and so it becometh thicker, yet sometimes you shall see it so thick, that you may cut it almost like butter. It may bee made by boyling the oyl awhile, but the former is the better