The
technology of the noble compression matters goes back to the 40's
19th century, in which the first negative/positive process was developed
by Henry Fox Talbot.
The
salt print (Talbotype) is considered as the oldest photographic
positive process beside the Daguerreotype. Developed in the year
1834 of William Henry Fox Talbot, it is considered today as the
original negative/positive process
of photo history.