Beet juice anthotype after two weeks. A lot more fading of negative space but still barely any tonal variation on the step wedge.
Tuesday, April 19, 2011
Anthotype (update)
Beet juice anthotype after two weeks. A lot more fading of negative space but still barely any tonal variation on the step wedge.
Sunday, April 17, 2011
04. Camera Obscura
Introduction:
camera obscura: is Latin and directly translated it means: "darkened chamber/room." The dark box or room an optical device that projects an image of its surroundings on a screen. The principles of the device have been known and experimented with by scientists and philosophers since the 4th century BCE. "Camera obscura"
Process:
1. I chose to use two different sized cereal boxes as the body and the lens provided in class to create my camera obscura.
2. I used the bigger of the two boxes as my fixed body and cut a hole in the bottom for the lens to fit.
3. The lens was glued and taped into the hole from the inside of the camera.
4. I then taped some cardboard runners inside the box to allow the smaller box to fit snugly inside.
5. The smaller box's top and bottom were cut off leaving just a hallow space.
6. I also taped cardboard runners on the side of the smaller box.
7. Waxed paper was taped to on end of the box creating a plane for the image to be projected on.
8. The smaller box was cut down to size until the correct focal distance was found by a focused image being projected on the viewing plane.
Links:
http://www.rleggat.com/photohistory/history/cameraob.htm
http://www.abelardomorell.net/
http://www.essentialvermeer.com/camera_obscura/co_one.html
Images:
camera obscura: is Latin and directly translated it means: "darkened chamber/room." The dark box or room an optical device that projects an image of its surroundings on a screen. The principles of the device have been known and experimented with by scientists and philosophers since the 4th century BCE. "Camera obscura"
1. I chose to use two different sized cereal boxes as the body and the lens provided in class to create my camera obscura.
2. I used the bigger of the two boxes as my fixed body and cut a hole in the bottom for the lens to fit.
3. The lens was glued and taped into the hole from the inside of the camera.
4. I then taped some cardboard runners inside the box to allow the smaller box to fit snugly inside.
5. The smaller box's top and bottom were cut off leaving just a hallow space.
6. I also taped cardboard runners on the side of the smaller box.
7. Waxed paper was taped to on end of the box creating a plane for the image to be projected on.
8. The smaller box was cut down to size until the correct focal distance was found by a focused image being projected on the viewing plane.
Links:
http://www.rleggat.com/photohistory/history/cameraob.htm
http://www.abelardomorell.net/
http://www.essentialvermeer.com/camera_obscura/co_one.html
Images:
03. Photogenic Drawing Pt. 2
Introduction:
salted paper prints: a salt solution is applied as a base coat on the paper and a photosensitive silver nitrate solution is then coated on to the paper. The image is created by laying a negative (paper or film) or object (lace or flowers) on top of the paper and then exposing it to sunlight. Exposure time will depend on the strength of solutions, paper type, and strength of light.
Henry Fox Talbot: invented the salt process in 1833. He began first by coating the paper only with silver nitrate. Only a faint image was produced. Talbot found by coating the paper with a salt solution first, the resulting image would be much stronger.
Sir John Herschel: invented hypo in 1839. This solution was used to permanently "fix" Talbot's photogenic drawings and other photosensitive surfaces.
Process:
1. First we chose the paper that worked best in our last experiment which was watercolor paper.
2. We coated our papers one time with 2% salt solution and dried them completely.
3. The papers were then coated with a 12% silver nitrate solution twice (The paper was dried in between coats).
4. We also coated an extra paper to use to experiment with yellow, red, and blue filters.
5. The extra sheet was exposed to sunlight with yellow, red, and blue filters put on certain sections of the paper. My sheet was exposed to the sun with different keys placed on the paper.
6. The exposure time was about 3 minutes in direct sunlight.
7. The images were ten washed with water and then put through 2 hypo baths to fix (about 3 minutes per bath).
8. They then were washed in a running water bath for 30 minutes.
Experience:
I used keys to create an image for my photogenic drawing. In the image you can see tonal variation between the parts of the paper that received direct sun, where the keys were, and the shadow around the keys. The paper was exposed for 3 minutes in the sunlight and although it seemed to be long enough, the image lightened up in the hypo baths. I think a few more minutes in the sun would produce a darker black and therefore more tonal separation in the image.
The paper that tested the filters was also exposed for 3 minutes. The blue filter produced the darkest value (almost as dark as without a filter). The blue filter allowed the shorter wavelengths through to the paper, therefore exposing the silver. The red and yellow filters did not let as much light through and therefore resulted in lighter tones.
Links:
http://www.alternativephotography.com/wp/processes/saltprints/a-dash-of-salt
http://www.flickr.com/groups/1335034@N20/
http://www.loc.gov/pictures/search/?q=%22salted%20paper%20prints%22%20and%20%22lc-dig%22&st=grid
Images:
salted paper prints: a salt solution is applied as a base coat on the paper and a photosensitive silver nitrate solution is then coated on to the paper. The image is created by laying a negative (paper or film) or object (lace or flowers) on top of the paper and then exposing it to sunlight. Exposure time will depend on the strength of solutions, paper type, and strength of light.
Henry Fox Talbot: invented the salt process in 1833. He began first by coating the paper only with silver nitrate. Only a faint image was produced. Talbot found by coating the paper with a salt solution first, the resulting image would be much stronger.
Sir John Herschel: invented hypo in 1839. This solution was used to permanently "fix" Talbot's photogenic drawings and other photosensitive surfaces.
Process:
1. First we chose the paper that worked best in our last experiment which was watercolor paper.
2. We coated our papers one time with 2% salt solution and dried them completely.
3. The papers were then coated with a 12% silver nitrate solution twice (The paper was dried in between coats).
4. We also coated an extra paper to use to experiment with yellow, red, and blue filters.
5. The extra sheet was exposed to sunlight with yellow, red, and blue filters put on certain sections of the paper. My sheet was exposed to the sun with different keys placed on the paper.
6. The exposure time was about 3 minutes in direct sunlight.
7. The images were ten washed with water and then put through 2 hypo baths to fix (about 3 minutes per bath).
8. They then were washed in a running water bath for 30 minutes.
Experience:
I used keys to create an image for my photogenic drawing. In the image you can see tonal variation between the parts of the paper that received direct sun, where the keys were, and the shadow around the keys. The paper was exposed for 3 minutes in the sunlight and although it seemed to be long enough, the image lightened up in the hypo baths. I think a few more minutes in the sun would produce a darker black and therefore more tonal separation in the image.
The paper that tested the filters was also exposed for 3 minutes. The blue filter produced the darkest value (almost as dark as without a filter). The blue filter allowed the shorter wavelengths through to the paper, therefore exposing the silver. The red and yellow filters did not let as much light through and therefore resulted in lighter tones.
Links:
http://www.alternativephotography.com/wp/processes/saltprints/a-dash-of-salt
http://www.flickr.com/groups/1335034@N20/
http://www.loc.gov/pictures/search/?q=%22salted%20paper%20prints%22%20and%20%22lc-dig%22&st=grid
Images:
Friday, April 1, 2011
Anthotype (update)
Beet juice anthotype after one week. Barely any tonal variation on the step wedge.
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