collodion
/kəˈloʊdiən/
noun
- a syrupy solution of nitrocellulose in ether and alcohol, used historically in photography and medicine to form a thin film.
- Collodion was a key material in the wet plate photography process.
- The doctor applied collodion to the small cut to form a protective coating.
- In the 19th century, photographers used collodion to create glass plate negatives.