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An early type was their Sepia Delft series printed in dark high contrast tones.This was followed years later by their Blue Tone cards that were similar to their lower contrast black & white albertypes except for their color.Many publishers large and small printed cards though the Albertype Co.
The plate could be reused for a limited quantity of reproductions. The gelatin often separated from the copper during the printing process, so the quantity of images that could be produced from a single plate was limited to approximately one hundred.
Alphonse-Louis Pontevin's process was adapted by C. Joseph Albert, a photographer from Munich, substituted glass for the copper plate, constructed a mechanical press, and also added another layer consisting of silicate mixed with gelatin, albumen or stale beer, which was applied between the gelatin and plate to facilitate adhesion.
Their postcards were not numbered and their name appears within the stamp box on their early cards.
When the divided back postcard was authorized, the Albertype company created a line down the back of their cards with the words Post Cards of Quality and later with The Finest American Made View Post Cards.
In the late nineteenth century, photographic and photomechanical reproduction were becoming increasingly popular for commercial use.
The collotype, one of the most commercially successful photomechanical processes, was introduced in 1855 by the French photographer and chemical engineer Alphonse-Louis Poitevin.
During its nearly sixty year run, the Albertype Company produced over twenty-five thousand prints, which were distributed across the United States in the form of postcards and viewbooks.
The company had agents, including Adolph Wittemann, take photographs of different cities and regions, which were then reproduced as collotypes.
Poitevin discovered that a bichromated gelatin-covered plate could be used to produce prints after being exposed to light through a negative. First, a plate was rendered light-sensitive by coating it with warm potassium or ammonium bichromated gelatin and heating it at a steady temperature in an oven until dry.Tags: Adult Dating, affair dating, sex dating