The platino-palladiotype process
The following method of printing in platinum, palladium, or a mixture of both metals, has been evolved to overcome the difficulties and disadvantages of the traditional platinotype.
Peter Bargh
The New Cyanotype process (Ware)
The cyanotype process, also known as the blue print process was invented by Sir John Herschel in 1842 and is still performed today by many darkroom enthusiasts.
Argyrotype process
Argyrotype is a user-friendly iron-based silver printing process that produces brown images on plain paper. It is derived from the Argentotype, Kallitype, and Vandyke processes of the 19th Century, but has greater simplicity, improved image stability, and longer sensitizer shelf-life.