Collodion

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.

It was discovered about 1846 by the French chemist and writer Louis Ménard.

Celloidin is a pure type of pyroxylin used to embed specimens which will be examined under a microscope.