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A Brief History of the Chemical Processes Used in …
- https://petapixel.com/2012/11/14/a-brief-history-of-the-chemical-processes-used-in-photography-over-the-years/
- 0:00. 0:00 / 4:57 •. Live. •. Photography isn’t even 200-years-old yet, but there have already been over 150 different chemical processes developed over its relatively short lifetime. In ...
EP0596994A1 - Improvements in or relating to …
- https://patents.google.com/patent/EP0596994A1/en
- In photographic processors, byproducts are generated by chemical reactions that occur during the processing of photographic materials. ... With this process, it is difficult to accurately maintain a fixed level of these by-products in the processing solutions. The present invention provides a method for controlling a subsystem which removes ...
Chemistry of Photography - Other Topics - Articles - Chemical ...
- https://www.cheresources.com/content/articles/other-topics/chemistry-of-photography
- The image, which was called a daguerreotype, could be made permanent by washing the plate with hot concentrated salt solution. In 1839 Daguerre demonstrated his photographic process to the Academy of Sciences in Paris. The process was later improved by using sodium thiosulfate to wash off the unexposed silver salts.
GB840731A - Improvements in photographic processes
- https://patents.google.com/patent/GB840731A/en
- GB840731A GB25922/56A GB2592256A GB840731A GB 840731 A GB840731 A GB 840731A GB 25922/56 A GB25922/56 A GB 25922/56A GB 2592256 A GB2592256 A GB 2592256A GB 840731 A GB840731 A GB 840731A Authority GB United Kingdom Prior art keywords phenyl hydroxy ethyl sulphoethyl naphthamide Prior art date 1956-03-07 Legal status (The legal status is an …
8 Crucial Innovations in the Invention of Photography
- https://www.history.com/news/8-crucial-innovations-in-the-invention-of-photography
- Archer’s secret was a chemical called collodion, a medical dressing that also proved highly effective as a means for coating light-sensitive solutions onto glass plates. While these “wet plates”...
Photography’s early evolution, c. 1840–c. 1900 - Britannica
- https://www.britannica.com/technology/photography/Photographys-early-evolution-c-1840-c-1900
- On September 21–23, 1840, while experimenting with gallic acid, a chemical he was informed would increase the sensitivity of his prepared paper, Talbot discovered that the acid could be used to develop a latent image. This discovery revolutionized photography on paper as it had revolutionized photography on metal in 1835.
Daguerreotype - Wikipedia
- https://en.wikipedia.org/wiki/Daguerreotype
- Daguerreotype (/ d ə ˈ ɡ ɛər (i.) ə ˌ t aɪ p,-(i.) oʊ-/ (); French: daguerréotype) was the first publicly available photographic process; it was widely used during the 1840s and 1850s. "Daguerreotype" also refers to an image created through this process. Invented by Louis Daguerre and introduced worldwide in 1839, the daguerreotype was almost completely superseded by 1860 with new ...
CHEMISTRY OF PHOTOGRAPHIC PROCESSING
- https://web.tech.uh.edu/digitalmedia/materials/3351/PHOTCHEM.pdf
- BASIC PHOTOGRAPHIC PROCESSING CHEMISTRY. Acids, Bases and Salts are all used in photographic processing solutions. The oxides are used to make acids, bases and salts but are never used directly in photographic processing. Acids are used in stop bath and fixing solutions. Therefore, they have pH values less than 7. Bases are used in the developer.
Improvements in process for stabilizing prints obtained …
- https://pubchem.ncbi.nlm.nih.gov/patent/GB-597147-A
- GB-597147-A chemical patent summary. ... Improvements in process for stabilizing prints obtained by the photographic bleaching-out process ... A., and HALMOS, C. Dec. 12, 1939, No. 32073. Convention date, Dec. 15, 1938. [Class 98 (ii)] Prints made by the bleach-out process on material sensitized with thiocarbamide derivatives are fixed by ...
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