News of Niepce’s work had reached another
Frenchman, Louis Jacques Mande Daguerre
(1787-1851) who had been experimenting to
capture camera obscura images
In 1829 Niepce and Daguerre became partners, a partnership
which lasted until Niepce’s death in 1833.
Daguerre perfected the process, reducing the exposure time
from eight hours to half an hour. He found that an image
could be made permanent by immersing it in salt.
In 1839 he announced the new process which he named
“daguerreotype” before the French Academy.