Hand coloring is a means by which one can add color to a photograph, or digital print and expand the visual and psychological impact. Those who do not feel comfortable drawing but feel the need for painterly expression may find satisfaction in hand coloring a photograph or digital print; modeling, perspective, and anatomy are already apparent in the image. Hand coloring should be done in indirect daylight or under daylight-balanced fluorescent or blue-frosted daylight bulbs. From the beginning of photography, daguerreotypes, which were the first practical photographic process and announced publicly in 1839, were hand colored by the very men and women who had previously been hired by patrons to paint miniature portraits. The two major categories of materials for hand coloring traditional photographs are water-based and oil-based, which may be used alone or in combination with each other.