thanks, but I don't need halftones. I need just pure black and pure transparency.
I also can not buy an imagesetter. I am a hobbyist printer and my office is too small for such a monster :-)
The negatives I try do make are very simple, no gradients, no shades, just hopefully dense black. This is why I would love to make a profile/curve for it. Still, I don't know how and where to start. Any help on this?