What is collodion?

What Does collodion Mean

Collodion is a term that comes from the Greek word kollṓdēs , translatable as "sticky" . It is a solution derived from cellulose and used as a binder .

It should be noted that cellulose is a polysaccharide (a saccharide made up of many monosaccharides) that makes up the wall of a plant cell. When a product derived from this polysaccharide is dissolved in an organic solvent, collodion is obtained.

Typically , collodion occurs from the solution of nitrocellulose in Alcohol and ether . Nitrocellulose, meanwhile, is a cellulose derivative that is nitrated (that is, a nitro group was introduced).
Collodion is used to prepare photographic plates . The French photographer Gustave Le Gray ( 1820 - 1884 ) is noted as one of the pioneers in the use of the method known as wet collodion .
For the development of wet collodion, the collodion must be placed on a glass plate . This plate must always be kept moist while the images are being taken and developed.
Development with the wet collodion was carried out using ammoniacal iron sulfate . In about thirty seconds the photo could be developed, which was an advantage over other procedures . However, it was common for glass plates to break or get scratched.
The so-called elastic collodion , meanwhile, is used in pharmaceutical formulas. Being sensitive to light and volatile, compositions that include this element are usually prepared directly in the container of the remedy, which is hermetically sealed.

Go up