A Selection of Hexandrian Plants, belonging to the natural order of Amaryllidae and Liliacae: Tiger Lily

The late 18th century saw the development of color printing, a laborious process in which the image is built up from separate plates for each color. Applying Newton’s theory of color, a plate was prepared for each of the three primary colors (blue, yellow, and red) as well as for a darker color (usually black, to provide a unifying background tone). These plates, too, were often embellished with hand work in watercolor