Alternative process
From Wikipedia, the free encyclopedia
The term alternative process refers to any non-silver based photographic printing process. Currently the standard photographic printing process is the gelatin-silver process.
Alternative processes are often called historical, or non-silver processes. Most of these processes were invented over 100 years ago and were used by early photographers.
Many contemporary photographers are revisiting alternative processes and applying new technologies (the Digital negative) and practices to these techniques.
See also: Photographic processes
[edit] Examples
- Daguerreotype
- Gum Bichromate and other Pigmented Dichromated Colloids which are used to directly generate a photographic print
- Platinum Process and Palladium Process
- Carbon Printing and various similar processes which use a non-sensitive intermediate layer to generate a photographic image
- Van Dyke Brown, Cyanotype, Tin-type and various other iron-based processes
- Resinotype and several similar processes which rely upon unexposed dichromated colloids to accept an insoluble pigment
- Oil Pigment processes, such as Bromoil
- Other processes which use silver halide but in various different ways other than the typical silver-gelatin formula, such as Salt Print
- Any number of processes which use more exotic materials, such as Uranium Chloride, Gold Chloride, and any number of other salts to directly or indirectly generate a photographic print.
