A DASH OF SALT
The salt print is a photographic process from the early days of photography which William Henry Fox Talbot (1800–1877) developed between 1834–1839.
In 1834, William Talbot already experimented with light and shadow images, the so-called photograms.
To develop an image he soaked paper in a light-sensitive solution and onto the impregnated paper he placed objects and then exposed it in the sun. The principle of this technique is called 'contact copy'.
The objects left 'white shadows' on paper, while the remaining paper blackened.