I've just taken part in a collodion workshop at Minnie Weisz Studio led by photographer John Brewer. Collodion wet plate photography was originated in the Victorian era with images printed onto glass - these are the negatives that can then be printed. After the glass plates are varnished they can last for 150 years and the end image is very painterly.
The photographs show some of the process, props and cameras used within the studio set-up. I still have to master the technicalities of this process but this workshop has proved to be very addictive.