Mark Osterman
2017
Photogenic drawing processed with Talbot's four methods of keeping them. From left to right: iodide fixed, chloride fixed, bromide fixed and "washed out" with hyposulfite of soda as it was known at that time.

Photograph
Private collection of Mark Osterman
Prepared at a workshop given by Mark Osterman at Laycock Abbey, 2017.
 
LL/117374