KODAK CIRCULAR PRINTS:
1889 - 1897.

Circular prints made in Kodak roll film cameras became popular with the general public because of their simplicity of use. Kodak's slogan was "You press the button, we do the rest." The Eastman Kodak pre loaded 100 exposure roll film camera eliminated the use of chemicals and preparations by the photographer. The camera with exposed film was sent to Eastman Kodak for processing. The Eastman Kodak products contributed to the emergence of amateur photography at the end of the 19th century.

CYANOTYPES:
1842 - Present.

Invented by Sr. John Herschel in 1842, The cyanotype is named for its rich blue-green hue. They are produced by light sensitive iron salts. Cyanotype prints have no emulsion; the light-sensitive iron salts have been infused into the paper fibers. Cyanotypes are relatively inexpensive and easy to make. They were a favorite of amateur photographers in the mid-1880s. The cyanotype process has remained virtually unchanged since its invention.