Name Amon First

Dessin photogénique

First conceived in England by William Henry Fox Talbot in 1834, photogenic drawing is the first photographic process capable of producing negative images on paper. The inventor did not publicize his experiments until the Daguerreotype was introduced in January 1839.

The paper is sensitized using a two-step process: water and table salt (sodium chloride) are applied, followed by a brushed-on coating of silver nitrate. The resulting silver chloride is not particularly sensitive, which means that the process requires relatively lengthy exposure times. As a result, the first photogenic drawings were obtained through direct contact with flat objects (plants, fabrics, drawings or manuscripts, etc.), following the principle of a photogram. Later on, Talbot experimented with using the same sensitized paper in camera obscura to capture still life images and architectural silhouettes, including some of his own home at Lacock Abbey.

The negative image was formed by printing out in direct light.

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