I watched a segment on a science show where a guy make a camera out of a courier van. If I remember correctly, he used Ilford RC by the roll. I don' t think he exposure times were any near the lengths your talking about.
Good luck and let us know how you do!
It may still be in the archives
I almost forgot, there was a thread about paper negs sometime ago. Try a search, I'm sure you'll only get a couple of hundred returns
Last edited by rogueish; 02-11-2005 at 10:16 AM. Click to view previous post history.