A transparent film of gun cotton dissolved in ether and containing potassium iodide spread over a glass plate negative. Wet collodion was sensitised on the spot and developed immediately. It gives high resolution of detail. Dry collodion was usually found to be less sensitive.

Thomas Annan Close, No. 136 Saltmarket 1868 - 1871

Artists

Thomas Annan
1829 - 1887
Francis Bedford
1816-1894
Roger Fenton
1819 -1869
Thomas Rodger
1833 - 1883
Fred Bremner
1863 - 1941