carbon and carbro pictures:
Carbon transfer is a printing process that creates an image formed by a layer of hardened, pigmented gelatin on a surface which is usually paper. The surface on which the image is printed is normally referred to as the “support” because carbon images can be printed on a variety of surfaces such as glass, metal, and synthetic paper sheets. It can also be used on a variety of natural papers.
https://www.alternativephotography.com/carbon-printing-process-overview/
Daguerrotype Photos:
Daguerreotype photography was the first commercially successful photographic process in the history of photography. Named after the inventor, Louis Jacques Mandé Daguerre, each daguerreotype is a unique image on a silvered copper plate.
In contrast to photographic paper, a daguerreotype is not flexible and is rather heavy.The daguerreotype is accurate, detailed and sharp. It has a mirror-like surface and is very fragile. Since the metal plate is extremely vulnerable, most daguerreotypes are presented in a special housing.
http://www.daguerreobase.org/en/knowledge-base/what-is-a-daguerreotype
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