ABSTRACT
This chapter concentrates on black-and-white emulsions that can be coated onto a variety of surfaces and handled under an enlarger in a conventional photographic darkroom, yielding a continuous-tone image. Coat-on emulsions are made by Rockland (Liquid Light), Luminos (Silverprint), Cachet (Black Magic), and Porter (U-Spread) in North America, and by Kentmere (SE), Fotospeed, and Jessop (Photo Emulsion) in England. All emulsions can be purchased worldwide. Each has its own characteristics, which are appreciated by its fans. In addition to their capabilities on paper, fabric, glass, metal, and ceramics, all enlargement emulsions can be toned (see Chapter 3) and hand colored (see Chapter 2). (Photo emulsion can be selectively coated onto canvas, then painted into, as shown in Plate XI by Joelle Shefts.) These emulsions do not require a negative the same size as the finished print. They can be purchased premixed in photography stores or ordered directly from the manufacturer (see Supply Sources). They cannot be used in sunlight; a darkroom is required.
