This week we worked on developing photos using a AgCl (silver chloride) base. This was the first week that we started actually printing the photos that we had taken. At first the photos didn't print out very well but we found a way to find the perfect exposure time, strength of the light, and distance of the light, through trial and error, to print the photos properly. I really enjoyed this process because I could finally see what my work looks like from start to finish. In humanities we finished reading the book Of Mice and Men by John Steinbeck. I really enjoyed the way Steinbeck uses his characters to make a statement about humanity. I also like how Steinbeck doesn't sugarcoat anything, he exposes humanity for what it is and he expresses that through his stories. I feel that this is a great way to convey the actual problems that humanity faces on a daily bases. I plan on reading more Steinbeck in the future. Chemistry Our Photosynthetic emulsion is made by combining Silver nitrate (AgNO3) and sodium Chloride (NaCl). This reaction then turns into Silver Chloride and Sodium Nitrate (AgCl and NaNO3) because, as I explain in a previous blog, the chemicals are interchangeable. AgCl is a crystal precipitant in this reaction. AgCl is also light sensitive so that we can use it to develop photos. All atoms have electrons which they tend to give and take from other atoms. When this process happens the two atoms combine thus binding, making combinations like AgCl and NaNO3. In our reaction, the chloride atom wants an electron while the silver atom doesn’t mind giving an electron away thus forming a bond between the two. Because electrons are negatively charged, the chloride atom becomes negatively charged and the silver atom becomes positively charged. When light hits this connection it breaks, freeing up a positively charged silver ion which turns into metallic silver. Metallic silver's natural color is black thus producing our black and white photos on paper. When the emulsion- coated paper is put in the developer bath, it adds an electron to the freed silver ions, making the reaction visible. Once we put the developed photo into the stop bath the developing immediately stops because it removes any leftover electrons from developing. After the stop bath we dunk the paper in a fixer bath to dissolve any remaining silver chloride salts so that they don’t keep producing overtime, thus increasing the lifetime of the photo. We then wash off the photo to remove any residual chemicals still left on the paper. A a a My Chemistry questions How does the silver ions turn into metallic silver? What happens to the sodium Nitrate during the developer process? Humanities In Humanities this week I finished my one thousand word essay about the photo that I took in Balboa Park. This essay consisted of five different perspectives breaking down the image and looking at its contents through different "Lenses" such as historical and composition. If you would like to see this essay, click the link below. click here. The next phase of the project is landscape photography. I'm really excited for this portion of the project because it means that I get to go out into the world and take pictures of nature and other landscapes. I really want to go up to Julian or somewhere in the mountains so that I can get a nice wide view of nature. I am sure that this phase will include me needing to plan a trip so I have been brainstorming places to go.
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May 2017
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