Calotype
The calotype is a slow, delicate positive / negative paper process, invented in 1841 by William Henry Fox Talbot. I often teach this process alongside Talbot's earlier 1839 Photogenic Drawing Technique. The Calotype is best learnt over three days to encompass paper preparation and printing.
I run workshops in the Calotype and early paper photographic processes at my studio in Nuneaton in collaboration with process historian Rob Douglas. The next one is scheduled for May 20th - 21st 2027. Further details can be found here.