Informs today, Tuesday, August 19, the daguerreotype, the first publicly announced photographic process and the first to come into widespread use, was introduced on this date 175 years ago. Invented by Louis Daguerre of France, the process consisted of exposing a thin silver-plated copper sheet to the vapor given off by iodine crystals, producing a coating of light-sensitive silver iodine on the surface. The plate was then exposed in the camera. This process required a very long exposure to produce a distinct image but Daguerre made the crucial discovery that an invisibly faint latent image created by a much shorter exposure could be chemically developed into a visible image. Upon seeing the image, the contents of which are unknown, Daguerre exclaimed, I have seized the light. I have arrested its flight! By the early 1860s this process was almost entirely replaced by others which were less expensive and produced more easily viewed images. A small-scale revival of daguerreotype among photographers interested in the historical process was increasingly apparent during the 1980s and 1990s and has persisted to the present. Anyone interested in photography or who just likes to take pictures should be grateful for the initial process. While on the subject I offer the following tune. Enjoy and have a good day, Facebookers.
Posted on: Tue, 19 Aug 2014 10:34:24 +0000
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