Kodak paper dating guide
- 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.Many other brands of photo paper were also manufactured in Europe but rarely left the continent.The very first photographs made were on printing out paper.This could go on for generations, and it is not uncommon to find the same photograph attributed to three different artists.
At other times a studio might buy out the negative inventory of older photographers and reprinted their images under the current studio name.
The simplicity of the process made it very attractive to amateur photographers.
Printing out papers fall into two categories, those coated with metallic salts, and those with coated with an emulsion.
This too is not foolproof for many publishers had large stocks of photo papers using them for decades after they stopped being manufactured.
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.
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And of course any image that contain a regularly patterned series of dots is not a photograph at all but a ink printed image.