The
technology of the noble compression matters goes back to the 40's
19th century, in which the first negativ/positive process was
developed by Henry Fox Talbot.
The
term Kallitype was invented in 1889 by W.W.J. Nichol. It
works with silver nitrate. Kallitype is the common term for several
variants of the picture production by means of iron salts and
silver nitrate.