John Bladen Bentley has spent 15 years perfecting a form of colour printing from the 19th century. He spends five days making a single photographic print. He is one of only four men worldwide who can still do the complex process of colour carbon transfer printing.
Bentley has no apprentices. "I've had students who have begged me to show them what I do. But after a week, once they see how difficult it is, they leave."