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Since the late 1970s, when the history of photography became an academic subject, and with increasing interest in photography in the art market, there have been frequent calls by various scholars for a 'new kind of history' of photography.
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Definition. Emulsion refers to a mixture of two immiscible substances, such as oil and water, where one substance is dispersed in the other. In photography, emulsions are critical as they serve as the light-sensitive layer in film and photographic plates, allowing for the capture of images.
Photographic emulsion is a fine suspension of insoluble light-sensitive crystals in a colloid sol, usually consisting of gelatin. The light-sensitive component is one or a mixture of silver halides: silver bromide, chloride and iodide.
4 Οκτ 2022 · Evidence and theories suggest that the history of photography is not brief, but in the context of this treatise, a nevertheless brief history of photography is presented in an attempt to highlight the efforts of humans through the ages to understand and capture images permanently.
What is formed is a thick creamy suspension which we call the emulsion. In the case of emulsions intended for plates or films, bromide predomin- ates, but iodide is usually present in proportions varying from a ratio of I 15 to I : 25 to the bromide.
Art, History. Whereas the observation of numerous light-sensitive substances and the formative evolution of the camera obscura predate 1800, the invention of photography, as we know it, was essentially a 19th-century phenomenon.
Evidence and theories suggest that the history of photography is not brief, but in the context of this treatise, a nevertheless brief history of photography is presented in an attempt to highlight the efforts of humans through the ages to understand and capture images permanently.
