Hi Umut, I will try to guess some answers, but I have not tried this myself!
- Now the big question , do albumen paper is usable when the camera set to bulb ?
I think albumen paper is most often used in a printing out process. The paper will be very slow. Commercial silver gelatin paper will produce a rather faint image in a couple hours with a lens like yours. Even commercial paper will be too slow for your pinhole camera as printing out paper. I *think* it might be possible, but the exposure may take one or several days... your lens will block some of the UV that the albumen paper is most sensitive to, and the paper could fog before the exposure is complete.
That said, there are developing out processes that might be used. I have never tried it myself but I think you could possibly develop the albumen paper in gallic acid, and it might well become nearly as fast as commercial printing paper.
I think though, if you are going to go to all this trouble, that you should consider making paper calotypes ( using sliver idodide rather than silver chloride ). You can visit the
calotype society group at flickr for a huge amount of information about this. The paper is soaked in potassium iodide first, then dried and then coated with the silver nitrate. After exposure it is developed in gallic acid and fixed in hypo. I am just learning how to do this myself and it is very satisfying. This kind of paper negative will expose in your camera in less than 10 minutes and can be used to contact print onto albumen paper.
- Does it give the elegant look or was the wet plate negative was the responsible ?
Probably both were responsible. Albumen prints can be very beautiful.
- Does converting negative to positive by computer , kills the grades and details ?
No, it does not kill the details or tones. But another possibility would be to make contact prints onto albumen. The color produced on an albumen print coated with salt and silver nitrate is reddish or pinkish, and it may block too much UV to make a good contact print... I don't know... I've wondered myself if it might be possible to use chlorides or bromide or citrate salts of silver to make an in-camera negative. I've never heard of anyone doing it. If you make a more traditional calotype, I know you can contact print onto albumen.
- How much silver nitrate needed to prepare 10 , 6x9 negatives ?
Well, I think 8 6x9 negatives is about the same surface area as 8x10 inches, so a little more than 1 ml of 12% silver nitrate solution should be sufficient. Not very much! Wear nitrile gloves and eye protection so that there is no chance of it getting in your eyes.
- Do I need to use asap after the preparation or does it stay safe ?
I have not made albumen paper so someone else should answer this, but paper prepared for salt printing will fog over time ( in a day or two ). I suspect albumen prints might last a little longer because the silver salt is suspended in albumen and above the paper, but I don't know. I vaguely remember reading about someone freezing coated albumen paper to make it last longer....
