silver iodide
pale yellow oderless powder that darkens on exposure to light.
1837: Louis Daguerre creates images on silver-plated copper, coated with silver iodide and "developed" with warmed mercury; ...
Sayce's experiments silver iodide had been considered the staple of a sensitive film on which to take negatives; and though bromide had been used by Major Russell and others, ...
Dundon and Ballard73 showed that when a bromo- iodide emulsion is developed, the iodide released by the development of a grain causes the conversion of some of the silver bromide in neighboring grains to silver iodide.
The sensitive material comprised silver iodide, deposited on a polished silver plated copper base. A positive image was produced by camera exposure and mercury "development", which turned light struck halides gray white.
A chemical compound of silver (usually silver bromide, silver chloride and silver iodide) used as the light-sensitive constituent (emulsion) in films.
Calotype process
Invented by W.H. Fox Talbot in 1839. Paper was coated with silver iodide and a solution of silver nitrate and gallic acid. Following exposure the paper was developed in a silver nitrate solution.
Search SWPP and BPPA ...
After the iodine and silver reacted to form a coating of silver iodide, the plate was placed into a light-proof bag and transferred into the back of a camera.
To make a calotype, plain sheets of writing paper are coated with a solution of silver nitrate, dried, then dipped in potassium iodide to form silver iodide.
Silver bromide, silver chloride, and silver iodide are the light-sensitive materials in silver emulsions. HANGER, FILM-A frame, usually of metal or plastic, for holding one or more photographic films to facilitate handling during processing.
 See also: Silver, Iodide, Photograph, Image, Exposure
|
