Developer (photography)

Definition and stakes

Edward M. Estabrooke,  Photography in the Studio and in the Field

“ The time of exposure and the strength of the developers are the most important factors in determining the quality and tone of the resulting transparency. Giving a short exposure and using a strong developer will ensure a vigorous picture with a rich velvety black tone. A long exposure, necessitating a weak developer, will produce fine gradation of light and shade, clear shadows and a warm brown tone. ”
Source: Gutenberg

Portrait of Herbert Eugene Ives Herbert Eugene Ives,  Airplane Photography

“ Characteristics of Developers for Plates and Films.—From the standpoint of practicability, aerial negative developers should have good keeping power, be slow to exhaust, and work well over a considerable range of temperatures. From the standpoint of the photographic quality desired in the negative, the developer should bring up the maximum amount of under-exposed detail. ”
Source: Gutenberg

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