There's been a resurgence of alternative photography among young artists and experimental photographers. One of the famous alternative processes is platinum print photography, being the most durable and archival among alternative prints.
It's widely-used by famous photographers of then, such as Robert Mapplethorpe, Manuel Álvarez Bravo, Alfred Stieglitz, Edward Weston, Imogen Cunningham, Edward S. Curtis, and a favorite by contemporary photographers George Tice and Sebastiao Salgado.
One of the many ways to develop a platinum print is through the glycerin process, in which a platinotype is developed with a developing agent using a soft brush -- particularly a fine spotter or a Japanese brush, and several pieces of special blotting paper.
Preview image is from the video.