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The Calotype Process

The oldest photographic negative in existence

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The inventor of the first negative from which multiple postive prints were made was Henry Fox Talbot.
The Calotype Process

Window in the South Gallery of Lacock Abbey made from the oldest photographic negative in existence

Henry Fox Talbot 1835
Talbot sensitized paper to light with a silver salt solution. He then exposed the paper to light. The background became black, and the subject was rendered in gradations of grey. This was a negative image, and from the paper negative, photographers could duplicate the image as many times as they wanted.

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