Sunday, March 27, 2011
photogenic_drawing
This weeks lab had extremely different results than last week, the prints were actually visible with a reasonable exposure time!
Photogenic drawing, also known as a calotype, was first announced by William Henry Talbot in 1839. This process is very similar to anthotypes, but with the addition of silver iodide which greatly changes the results of the prints. The prints were first coated with varying amounts of NaCl and AgNO3 and then exposed outside under direct sunlight. After the prints were exposed, the silver iodide decomposes, and any that remains needs to be washed off. In the case of the class experiment, the prints were then washed in a salt water solution so that the image would "fix" to the paper.
After our experiment a few conclusions can be drawn from the different solutions of NaCl and AgNO3 that were used. The heavy weight paper used in our tests held up much better than lighter weight paper and resulted in better quality prints just because the paper didn't disintegrate. Another conclusion is that the stronger the solution, and the more coats of it, yielded darker exposures.
After our experiment a few conclusions can be drawn from the different solutions of NaCl and AgNO3 that were used. The heavy weight paper used in our tests held up much better than lighter weight paper and resulted in better quality prints just because the paper didn't disintegrate. Another conclusion is that the stronger the solution, and the more coats of it, yielded darker exposures.
photogenic_drawing
Here are the boards from the second lab, photogenic drawing. This process yielded more visible results then the previous anthotype experiments
anthotypes
The first lab that we started working on had to deal with anthotypes. This lab will continue throughout the quarter and I am excited to see the results of this process.
Here are some pictures of what my prints may turn out like:
The original process was created by Sir John Herschel in 1842. It involves using plant matter, such as raspberry, strawberry, beets, flowers, and the like. The process involves crushing whichever plant matter you choose and then applying it to dry paper. After the paper is evenly coated, objects are used to cover up certain sections of the paper while the exposure takes place. Although this is a very interesting process, it is a very slow one. The prints are expected to take weeks to develop!
http://www.youtube.com/watch?v=g6E193iGgW8
Here are some pictures of what my prints may turn out like:
The original process was created by Sir John Herschel in 1842. It involves using plant matter, such as raspberry, strawberry, beets, flowers, and the like. The process involves crushing whichever plant matter you choose and then applying it to dry paper. After the paper is evenly coated, objects are used to cover up certain sections of the paper while the exposure takes place. Although this is a very interesting process, it is a very slow one. The prints are expected to take weeks to develop!
http://www.youtube.com/watch?v=g6E193iGgW8
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