CJ, Jobo makes an inexpensive processor just like what you are describing called a Nova Slot Processor. You would want the Monochrome processor, http://www.jobo-usa.com/products/novaproc.htm#Key%20Features I always like the mystery of watching the paper develop in a tray myself. I used to have a little contact printer which had a 25 Watt bulb in a box with a glass lid and a hinged board on top. Put the negative in facing up, the unexposed paper facing down on top, close the lid and switch it on the the right amount of time. It did 5x7 and was only about 4 inches high. I'm not sure if there would be enough light coming through the pinhole for you method of contact printing and the paper negative would absorb too much light. I did see a photographer at an Indian ethnic festival on the mall in DC a few years ago use his camera to rephotograph a paper negative to make a positive. His camera was built to hold his developing trays and paper on the inside like your boxes. He shot customers in front of a white sheet, processed them, washed the paper negs in a big plastic bucket, used scissors to cut out around the figures and then stuck them down upon a negative of the Taj Mahal. His camera had a flip up copy board in front that he stuck these on then refocused the lens and shot another image to make it positive. Since seeing this I've wanted to make my own darkroom in a camera. I think you might be able to do something similar by just re-shooting the images with a pinhole camera.
Chris -- Pinhole Blender [email protected] http://www.pinholeblender.com > -------- Original Message -------- > Subject: [pinhole-discussion] A new question > From: "CJ Rumpolo" <[email protected]> > Date: Wed, August 27, 2003 12:45 pm > To: pinhole-discussion@p at ??????? > > Hi again. I just finished my first session with my dark box and it > indeed > works. I am smiling right now. I just need to work out two things yet. > The > first being that tray processing would not be too feasible in this box. > The > floor dimensions are 17 inches by about 12 inches. I was thinking of > making > a vertical processing unit where I have tall troughs filled with the > chemicals and students would slip the paper into each trough using a > clothes > pin or something. I am still thinking about that. > My second problem is something that I thought this group would be > able > to help me out on. I was thinking of making a contacting printing unit > with > a light in it. But trying to keep this project as simple and as low > cost as > I can, I thought that my students could simply layer some glass, the > paper > negative and the unexposed paper on the bottom of my dark box and then > lift > the lid, count off the time needed for exposure and then close the box. > This > would be fine if the exposure time were more than a few seconds, so I > came > across another idea that might work. If you make a pinhole camera and > use > photographic paper as a negative. Could one not also use the same > pinhole > camera as a type of contact printer as well? If you placed your paper > negative together with an unexposed sheet of paper (emulsion sides > together) > and place both sheets into your pinhole camera such that the paper > negative > is between the pinhole and the unexposed paper, then place the camera > in > front of a light source (say an evenly lit white wall), would this act > as a > contact printer? > Also if this would work, might this also even out the exposure of > the > resulting image. Forgive the none technical terms from the following. > If we > make a pinhole camera that has a curved back of a known radius, then > the > entire film plane is equidistant from the pinhole aperture. This > should > result in a very evenly exposed negative. Yet, if we make a pinhole > camera > with a flat film plane there will be portions of the film plane that > are > further from the pinhole than others. The edges of the film plane would > be > further from the pinhole and thus require more exposure to be properly > exposed. While in contrast the central region of the film plane being > closer > to the film plane would require less time to be properly exposed. This > would > result in a negative that usually has the two noticeable zones of > exposure. > The central portion of the image is less exposed than the edge portion > of > the image. > If this is true then by using the same pinhole camera as a contact > printer > you would get the same gradation of light exposure. The resulting > print > would be corrected for this unevenness of exposure. Or am in serious > need of > some sleep? I hope that this made sense. And I hope the more "advance > pinholers" can help me with this technical aspect of my project. > Ultimately > I would need to try this out, experience is how I best learn. Thank you > for > your time and for any response to this question. CJ. > > > _______________________________________________ > Post to the list as PLAIN TEXT only - no HTML > Pinhole-Discussion mailing list > Pinhole-Discussion@p at ??????? > unsubscribe or change your account at > http://www.???????/discussion/
