Rigid collodion is a type of collodion that is used in photography and other applications. It is made from a mixture of nitrocellulose, alcohol, and ether, and it is applied to a surface in a thin layer. When the collodion dries, it forms a hard, protective coating.
Rigid collodion has been used for a variety of purposes over the years, including as a photographic negative, a varnish, and a wound dressing. It is still used today in some applications, such as in the restoration of old photographs.
