The very first exhibition in Britain devoted entirely to salted paper prints, one of the earliest forms of photography. The process was invented in Britain and spread around the world through the work of British and international photographers – artists, scientists, adventurers and entrepreneurs such as William Henry Fox Talbot, Linnaeus Tripe and Auguste Salzmann to name a few.

Salt & Silver: Early Photography 1840-1860 is at Tate Britain, London, from 25 February to 7 June

Read William Cook’s article ‘Frame and fortune: How early photographers changed the world’ featured from BBC

Roger Fenton, Cantiniére, 1855. © Wilson Centre for Photography

Roger Fenton, Cantiniére, 1855. © Wilson Centre for Photography