Ilford Photo is a manufacturer of photographic materials known worldwide for its black-and-white film and papers and chemicals, as previously as its range of Ilfochrome and Ilfocolor colour printing materials, before these were discontinued. Ilfochrome was formerly called Cibachrome, developed in partnership with the Swiss company CIBA-Geigy. Formerly, it published the Ilford Manual of Photography, a comprehensive manual of everything photographic, including the optics, physics and chemistry of photography, along with recipes for many developers.