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calotype    
碘化银纸照相法; 光力摄影法

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  • Calotype - Wikipedia
    Calotype or talbotype is an early photographic process introduced in 1841 by William Henry Fox Talbot, [1] using paper [2] coated with silver iodide Paper texture effects in calotype photography limit the ability of this early process to record low contrast details and textures
  • Calotype | Definition, Process, Facts | Britannica
    Calotype, early photographic technique invented by William Henry Fox Talbot of Great Britain in the 1830s In this technique, a sheet of paper coated with silver chloride was exposed to light in a camera obscura; those areas hit by light became dark in tone, yielding a negative image
  • The Calotype Process - The University of Glasgow
    Strictly speaking, the term calotype referred only to the developed negative process Prints could also be made on calotype paper, exposed and then developed much like modern photographic papers, but this was a more complicated process and led to what were considered unsatisfactory cold print tones
  • Calotype Chemistry Process Overview - Tim Layton Fine Art
    At its core, the calotype process involves precipitating silver iodide within the fibers of the paper, sensitizing it with an excess of silver ions, imprinting a latent image through exposure to natural light, and then developing the image using gallic acid
  • The calotype and its place in the development of photography
    They used the calotype process, one of the earliest practical methods of producing photographs The following notes attempt to provide a short description of this process, and to put it in context, now photography has become an integral part of the way we communicate
  • The Calotype Process - National Gallery of Canada
    In 1840, Talbot incorporated additional chemicals and treatments to increase the paper’s light sensitivity, permitting exposure within a camera obscura He called the resulting image a “calotype” (derived from the Greek word kalos, meaning “beautiful”), and patented the process in 1841
  • What is Calotype Photography? Definition, History, Process . . .
    Calotype photography is a process that was invented by William Henry Fox Talbot in 1841 It is a form of photographic process that involves the use of a negative image The term “calotype” comes from the Greek words “kalos,” meaning beautiful, and “typos,” meaning impression





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