Light energy alone, usually from the sun, reacted with the light sensitive chemicals on the paper’s surface to produce an image.They only needed to be fixed to preserve the exposed image.
NOTE: There were many other photo papers manufactured in addition to those listed on this page, and even these could be made in different finishes from matte to glossy.
- This process was invented in 1842, but its first known use for a postcard was in 1888.
No commercial paper was needed, though eventually manufactured, as card stock could be photosensitized at home and printed out. Variations on this process were developed over the years that followed.
A studio sometimes grew to the point where additional photographers were hired but all the photographs produced were published with the original photographers name.
At other times a studio might buy out the negative inventory of older photographers and reprinted their images under the current studio name.