Wet plate collodion is a photographic technique invented in the 1850's in which the image is captured on a hard plate, i.e. if using a tin plate it is termed 'tintype'. Today most people use aluminium or glass. Collodion emulsion is poured onto the plate, which is then sensitized to light in a silver nitrate bath. The plate is then quickly transferred to the camera, the picture taken and developed and fixed. As the name suggests, it must be done while the emulsion is still wet and therefore haste is required. The film speed is about ISO=1 so even in bright sunlight exposures are slow.
I was instructed by Ellie Young at Gold Street Studios.