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Chemistry Of AgBr In Photography

Chemistry Of AgBr In Photography. Cain Lamper. Background Info on Photograph. 1725, Johann Schulze found silver nitrate to be light sensitive Image disappeared 1830’s Louis Daguerre and Nicéphore Niépce Salt Bath Fixed Image Black and White. Chemical. AgBr (Silver Bromide) Crystal

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Chemistry Of AgBr In Photography

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  1. Chemistry Of AgBrIn Photography Cain Lamper

  2. Background Info on Photograph • 1725, Johann Schulze found silver nitrate to be light sensitive • Image disappeared • 1830’s Louis Daguerre and Nicéphore Niépce • Salt Bath Fixed Image • Black and White

  3. Chemical • AgBr (Silver Bromide) • Crystal • Grains in Gelatin

  4. Reaction • AgBr (UV exposure) Ag++ Br + e- • Ag+ + e-  Ag0 • Decomposition Reaction

  5. Why AgBr is Important and How it works • Light sensitive • Sensitive to Wavelengths • Latent image • Grain size h Sensitivity h

  6. How AgBr is Produced • Hard to Produce by Direct Reaction • AgNO3(aq) + KBr(aq) → AgBr(s)+ KNO3(aq) • Silver Nitrate + Potassium Bromide → Silver Bromide + Potassium Nitrate • Double Replacement Reaction

  7. How It Relates to My Life • Photographs everywhere • Capture Memories • Careers • Express yourself

  8. Sources Buffaloe, Ed. "Mixing Developers." Freestlye Photographic Supplies. 2002. 30 Mar. 2008 http://unblinkingeye.com/Articles/Developers/developers.html . "Photography." Caveman Chemistry. 30 Mar. 2008 < http://cavemanchemistry.com/oldcave/projects/photo/index.html >. "Chemistry of Black and White Photography." 30 Mar. 2008<http://science.csustan.edu/nhuy/chem1002/photoexp.htm >. Myers, Drew. "Chemistry of Photography." 2008. 6 Apr. 2008 <http://www.cheresources.com/photochem.shtml>.

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