From 1848, a method of coating egg white mixed with light sensitive silver salts on glass. Low in sensitivity, which led to long exposures, but extremely fine in grain, which gave it life in specialis [..]

A printed-out paper common from about 1852 onwards. A solution of egg white was mixed with light sensitive silver salts and coated on paper. This provided a smooth, glossy printing surface, often tone [..]

Sometimes called the Talbotype. A developed-out process almost always used for negatives. Discovered by WHFT in 1840 and patented and published in 1841. Developed with a solution containing gallic aci [..]

First employed by WHFT in 1834 (without being named) but commonly associated with French artists of the 1850s and later. A negative was created manually by scratching through an opaque varnish layer c [..]

A mixture of guncotton dissolved in ether and alcohol, first used as a bandage for wounds — the solvents would evaporate quickly, leaving behind a tough clear film. In 1851, Frederick Scott Archer use [..]

Invented by Sir John Herschel in 1842. A mixture of dichromate and iron salts was coated on plain paper. Too slow for camera use, this paper could be exposed under a negative or more commonly under an [..]

Invented by Louis Jacques Mandé Daguerre and announced in 1839, this was the first process to take advantage of a latent image. A silver-plated sheet of copper was sensitised with the fumes of chlorin [..]

An invisible latent image was formed by a brief action of light. A developer (normally a chemical) subsequently built this into a fully visible final image. Normally of most value in producing negativ [..]

In today’s parlance, the process of eliminating a photographic material’s residual sensitivity to light. Talbot originally fixed his papers with potassium iodide, potassium bromide or strong solutions [..]

WHFT’s first photographic process, invented by him in 1834 and initially called sciagraphy. When announced in 1839, he called it as photogenic drawing, a term Herschel soon broadened under the umbrell [..]