1. Post an example of a Daguerreotype image. Who invented the Daguerreoty process? Briefly describe the advantages and disadvantages of the process.
Daguerre invented the Daguerre type process. A negative is that it had to be handled extremely delicately and it took extremely long. An advantage is it was a clear picture.
2. Post an example of a Calotype image. Who invented the Calotype process? Briefly describe the advantages and disadvantages of the process.
That is a calotype picture. William Fox Talbot created it. The sensitive element of a calotype is silver iodide. With exposure to light, silver iodide decomposes to silver leaving iodide as a free element. Excess silver iodide is washed away after oxidizing the pure silver with an application of gallo-nitrate. An advantage is that you could have both a negative and a positive copy of the picture. A disadvantage is that when it was extremely hot outside the photo would become extremely hot and almost melt… if not kept in a cool area.
3. Post an example of a Wet Collodion Process image. Who invented the Wet Collodion Process process? Briefly describe the advantages and disadvantages of the process
Fredrick Scott Archer created this system of photography. A disadvantage is that the glass plates were so fragile and easily breakable. An advantage is that it processed in 2 to 3 seconds.
4. Post an example of a Dry Plate Process image. Who invented the Dry Plate Process process? Briefly describe the advantages and disadvantages of the process.
Richard Maddox created this process. It use gelatin and that is a wet sticky substance so I kinda put that as a disadvantage but it created a great picture and its the basis of photography even today.
5. Who is credited with taking the first photograph of a human? Post the photograph.
This photograph of Boulevard du Temple in Paris was made in 1838 by Louis Daguerre. This was the first photograph of a human.
6. What is photo emulsion?
Photographic emulsion is a light-sensitive colloid, such as gelatin, coated onto a substrate. In silver-gelatin photography, the emulsion consists of silver halide crystals suspended in gelatin, and the substrate may be glass, plastic film, paper or fabric.
7. Why did Eastman name his company Kodak?
The letter “K” had been a favorite of Eastman’s, he is quoted as saying, “it seems a strong, incisive sort of letter.” He and his mother devised the name Kodak with an anagram set. He said that there were three principal concepts he used in creating the name: it should be short, one cannot mispronounce it, and it could not resemble anything or be associated with anything but Kodak.
8. Briefly explain how Polaroid film (instant photography) works?
Instant positive film (which produced a print) uses diffusion transfer to move the dyes from the negative to the positive via a reagent. The process varies according to the film type.
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