platinum and palladium

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.

classic cyanotype process

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.