UMBRA, Crude and calcined.
A useful colour enough for common purposes; some painters use it for shades in flesh, but very improperly, for it is a very raw colour crude or calcined, and only fit to be used in drapery or back grounds.
These are all the colours that ought to be used for painting in encaustic, with the pencil; there are a few more that might be employed in this manner, but as they are rather inferior in quality, or only compounds of those already mentioned, I omit them; a few, not commonly used in oil painting that notwithstanding might be used in encaustic, I shall mention under the article of crayons, as they belong more to, and are more useful in that way.