Collodion is a solution of nitrocellulose in ether or acetone, sometimes with the addition of alcohols. Its generic name is pyroxylin solution. It is highly flammable. As the solvent evaporates, it dries to a celluloid-like film.
Collodion
A soluble gun cotton, dissolved in a mixture of ether and alcohol.
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More Photographic Terms ...
Collodion negatives--see Wet Plate
Collodion prints used the same sticky nitrocelluluse emulsion, collodion, as ambrotypes. This was mixed with silver chloride and coated onto paper.
collodion process
a method of photography where a glass plate is coated with salted (iodized) negative collodion and sensitized by immursion in an acidified silver nitrate solution and exposed in a moist condition.
-Collodion process - also known as "wet collodion" was invented by Frederick Scott Archer in 1851-52.
1851: Frederick Scott Archer, a sculptor in London, improves photographic resolution by spreading a mixture of collodion (nitrated cotton dissolved in ether and alcoohol) and chemicals on sheets of glass.
The discoverer of the Sabatier effect, William Jackson, obtained direct positive transparencies with collodion plates in 1857.
To reduce exposure times, Collodion pictures were processed while the photographic plate was still wet. As a result, large amounts of developing equipment had to be available on location. Dry plate processing wasn't available until 1871.
The plate was coated with collodion and sensitized just before use, as in the wet plate process].
Magnolia blossoms, Chester, Conn., 2009. Printed on collodion wet-plate tintype via an inkjet film positive from a Nikon D3X original. Colorized using Adobe Photoshop.
Warnecke got a patent on his "roller slide" for a more successful rollfilm variant, a paper roll with light sensitive dry collodion surface for 100 exposures. The rollholder was made well, but the film material was not.
 See also: Photograph, Image, Photography, Plate, Photographer
  
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