Postitive print by William Henry Fox Talbot (1800-1877). Photogenic drawing was Talbot's name for the results of his first, camerales photographic proces. It was derived from experiments he made between 1835-1839, resulting in the invention of the negative/positive proces for producing photographs, which he patented as the calotype proces in 1841. To produce a photogenic drawing Talbot placed objects or leaves on sensitized paper. Areas where sunlight fell darkened, whereas covered areas remained light, resulting in a printed out negative image.
© National Media Museum / Science & Society Picture Library