John Milleker Jr. darkroom.baltimoresun.com/ |
A cyanotype is a photographic process that creates a blue and white photo. A cyanotype would be made by painting a photosensitive mixture on paper and then you would place an object in front of the piece of paper which would expose the mixture creating a negative.
Anna Atkins vernacularphotography.com/ |
A gum bichromate is another early photographic process that involves placing a photosensitive mixture onto a piece of paper that is exposed to light. While a lot like a cyanotype, a gum bichromate would be multi-layered with each layer being exposed individually with photosensitive mixtures that contain different colored pigments.
Scott lumberjocks.com/ |