"Kalotype", or "talbotype" was a developing process, developed from Henry Fox Talbot's previous image-developing process by using a different silver salt (silver iodide instead of silver chloride) and a developing agent (bile acid and silver nitrate) to produce an invisibly
A method of development invented by William Fox Talbot in the 1830s, the foundation was plain table salt. The images are reddish brown to brownish violet tones with a matte finish. Salt paper copies are sometimes called kalotypier, kalotypi is
In my quest to learn more about different photography techniques through the ages, I ended up among something that was popular in the decades around 1900 and called Carte de Visite (business card in French), in Swedish: business card portraits.