Albumen print

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The albumen print , also called printed silver albumen , was published in January 1847 by Louis Dà © à © sirà ©  © Blanquart-Evrard, and is the first commercial method that can be utilized for produce photos. print on the base of the paper from the negative. It used an albumen found in an egg white to bind photographic chemicals to paper and became the dominant form of positive photography from 1855 to the beginning of the 20th century, with a peak in the period 1860-90. During the mid-19th century, carte de visite became one of the more popular uses of the albumen method. In the 19th century, E & amp; H. T. Anthony & amp; The Company is the largest maker and distributor of Album and paper photo prints in the United States.

Video Albumen print

Album printing process

1. A piece of paper, usually 100% cotton, is coated with an egg white emulsion (albumen) and salt (sodium chloride or ammonium chloride), then dried. The albumen seals the paper and creates a slightly shiny surface for the sensitizer to rest.
2. The paper is then immersed in a silver nitrate and water solution that makes the surface sensitive to UV light.
3. The paper is then dried without UV light.
4. Prepared dry paper is placed in a frame with direct contact below the negative. Negatively it is traditionally a negative glass with emulsion collodion, but this step can be done with negative modern halide silver as well. The paper with the negatives is then exposed to light until the image reaches the desired level of darkness, which is usually slightly lighter than the final product. Although direct sunlight has been used for a long time, UV exposure units are often used simultaneously as they are more predictable, because the paper is most sensitive to ultraviolet light.
5. Bath sodium thiosulfate improves print exposure, preventing further embezzlement.
6. Optional gold or selenium toning increases the photo tone and stabilizes against fading. Depending on the toner, the toning can be done before or after the installation of the mold.

Since images arise as a direct result of light exposure, without the help of a growing solution, albumen prints can be said to be printed instead of the photos being developed.

Table salt (sodium chloride) in an albumen emulsion forms silver chloride when in contact with silver nitrate. Silver chloride is unstable when exposed to light, which makes it decompose into silver and chlorine. The silver ion (Ag) is reduced to silver (Ag) by the addition of electrons during the development/printing process, and the remaining silver chloride is washed during installation. The black parts of the image are formed by silver metal (Ag).

Maps Albumen print

References

• Marshall, F.A.S. Photography: the importance of its application in preserving picture notes. Contains a practical description of the Talbotype process (London: Vulture & Remington; Peterborough, T Chadwell & J Clarke, 1855).

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External links

• George Eastman House "Photography Process 3.0: Album Process"
• Old Photos of Japan - Sample photos of hand-colored albumen
• Album prints from American University in Cairo Rare Books and Digital Library Special Collections
• Photo Album: history, science, and preservation
• Jarvis, Chad. "Album printing: Creating and processing albumen paper". Alternativephotography.com.
• "Kiwi Sun Photography: Album Printing". Archived from the original on 2009-01-07.
• Japanese photographs - A collection of hand-painted Japanese handmade albumen prints

Source of the article : Wikipedia