In memory of Mrs. Hermon A. Kelley 1946.252
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
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