The sabbatier effect is cool too. The second "light flash" is the hardest part of getting them right. if contact printing, why not just use ortho. it's cheap. and you get the benefit of a negative.
The sabbatier effect is cool too. The second "light flash" is the hardest part of getting them right. if contact printing, why not just use ortho. it's cheap. and you get the benefit of a negative.
I shoot paper negs and then scan them for a positive view. Lot of old paper laying around not being used... found two boxes of Kodabromide F2 that work great in a soft developer - like Selectol.
Not exactly a "normal" paper type but you can use Polaroid or Fuji instant film in pinhole cameras. The upside is no chemistry unless you decide to use type 55 and process for the negative (which is quite tangential to your topic anyway).
Polaroid is of course going the way of the dodo but Fuji is quite available, especially if you like the pack-film size prints. I've been playing quite a bit with making pinhole images then scanning to be reprinted at 8x10. Bit of a cheat but I like the look.
Eastman Kodak used to make a "Direct Positive" paper. Of course it required a chemistry similar to that for colour transparencies, though simpler because no colour developer involved. If I recall correctly (across some fifty years) it involved first developing the latent image, then bleaching it, re-exposing the paper to bright light to expose the remaining unexposed silver halides, redeveloping to obtain the positive image and fixing to remove the unwanted bleached negative image. Don't hold me to that, I might have the order of steps not quite right. I suspect it could probably be done with many papers; some would react better than others to the process. The process ought to be in one or another of the older Kodak darkroom/processing databooks.
I have heard of people shooting on standard single weight fiber B&W paper then applying a coating of paraffin wax to the base to make it more translucent. This would then be used as a paper negative. I guess this is how they did it back in the old days of photography (when men were men and sheep were scared). I have used paper negs in the past using both RC and FB papers, without the wax coating, and they actually make a descent image when contact printed. Be sure that your paper doesn't have the company's name imprinted on the back.
r.
Paper negatives are easy. Use any photo paper (without printing on the back; single weight if you can get it), cut to 4x5, put in your film holder and shoot. When using Ilford paper, for example, use about 2 ISO (or as low as you can go on your meter). Develop normally, put in the enlarger and make a print.
Ted
I'm pretty sure Ilford is making direct positive paper, but very contrasty iirc what I read here. Have a look at their website and use those keywords/brand names to narrow down your search.
Never having tried it, but I could imagine reversal chemistry might work for paper negatives, to develop as positives. I believe the fundamental chemistry of paper and film is similar but that the amount of silver is different which may preclude good results.
There is a paper negative section on this site somewhere those folks surely know about all this. I'd hope anyway.
Please go to the existing and informative "paper negatives" and "Harmon Direct Positive Images" threads. This new thread is going to waste a lot of your time and miss many valuable contributions over the last year or so. Honest, you're spinning your wheels here.
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