I've been playing around with oil prints for fun, and have a question. I've been coating watercolour paper with Knox gelatin, brushing on 3% potassium dichromate and contact printing 4x5 negs under UV. My first question -- how do you know what the proper UV exposure is? I've exposed negs from six to 12 minutes and can't see any difference in the matrix that comes out. There is a faint brown image on all of them, but I can't see detail in them, until I start to ink them up, after which details starts to emerge. I'm not having a lot of success inking yet ( I didn't expect to), the ink seems to smudge up pretty heavy in the dark parts and muddies up in the highlights. There is an image there, but it's not very good. Am I overexposing the matrix, or underexposing? How can I tell? As well, after brushing on the potass. dischrom solution, the book I have says the paper becomes light sensitive as it dries. Is the drying print sensitive to ALL light, or just UV? I'm used to the other alt processes that allow us to work under faint tungsten. Is that a bad idea when drying oil print paper? Any help greatly appreciated.