STEEP (TO) (v.)
ANONYME, The Excellency of the Pen and Pencil, Exemplifying The Uses of them in the most Exquisite and Mysterious Arts of Drawing, Etching, Engraving, Limning, Painting in Oyl, Washing of Maps & Pictures. Also the way to Cleanse any Old Painting, and Preserve the Colours. Collected from the Writings of the ablest Masters both Ancient and Modern, as Albert Durer, P. Lomantius, and divers others. Furnished with divers Cuts in Copper, being Copied from the best Masters, and here inserted for Examples for the Learner to Practice by. A Work very useful for all Gentlemen, and other Ingenious Spirits, either Artificers or others, London, Dorman Newman, 1688.1 quotations
Of Limning in Water-Colours, The Third Book, Chap. II, Of Colours used in Limning : their names, and how to order them, p. 89-90
I Said (among the Colours before mentioned) there was only Sap green to be Steeped, though in Colours to wash Maps and Prints, there are many, […]. To Steep your Sap-green do thus, take a quantity thereof and put it into a Shell, and fill the shell with fair water, to which add some fine powder of Allum to raise the colour ; let it thus steep twenty four hours, and you will have a very good Green.