These processes, involving chemical reactions initiated by light, come within the declared scope of this work. However, the history of photography is well documented and does not warrant repetition here. Instead, the named processes that have been, or are being, used commercially are listed in the following text and the reader is referred to the bibliography for references to consult for their details. Reprographic processes for line drawings (e.g. Blueprint) are given individual entries-see reprography. Photographic processes include: Agfacolor, Ambrotype, Anscocolor, Autochrome, Autotype, bichromate, Bromoil, Calotype, carbon, Carbro, Chromatone, Chrysotype, Cibachrome, collodion, Cyanotype, Daguerreotype, Dufay, Dufaycolor, Duplex, Duxochrome, Dyebro, Ektachrome, Ektacolor, Energiatype, Ferraniacolor, Ferrotype, Finlay, Flexichrome, Gasparcolor, Gevacolor, Gum, Hicro, hydrotype, Ilfochrome, Ilford, Itek, Joly, Jos-Pe, KDB, Kodachrome, Kodacolor, Kotovachrome, Lignose, Lippman, Lumière, Melainotype, Minicolor, Omnicolore, Ozobrome, Ozotype, Paget, phototype, Pinatype, Platinotype, Polacolor, Polaroid-Land, Polychrome, Printon, Raydex, Sakuracolor, Tannin, Thomas, Tintype, Utocolor, Uvachrome, Vivex, Warner-Powrie, wet collodion, Woodbury type, Zincotype