Here's the set-up. Bunch of who knows how old and how it was stored Kodak graphic arts film. Box of chemicals to make DK-50, which is what is on the data sheet. The hydroquinone and the metol are probably as old as the film, but the rest of the chemistry the age probably doesn't matter. The idea is to enlarge a 6X6 negative onto a sheet of the film. The light source is a cold lamp with no filter. Safelights in the darkroom are all red. Everything is pretty close to 70f. Tests strips suggested an exposure of 5 seconds at f22, with an 80mm lens. The data sheet said something to the effect "expose it like you would a sheet of enlarging paper." 5 seconds at f22 is not something I normally do. What's bothering me is even with very short exposures and extended development, I didn't get any infectious development. I got plenty of development, but it looks like a normal positive instead of a very harsh high contrast image that I was expecting. I did a fog check on the film, and it looks good. Of course, I don't know what this film is supposed to look like anyway. The DK-50 recipe I was working from called for a "balanced alkali," which I assumed sodium carbonate would work. Sounds pretty balanced, anyways. Bad assumption? I don't have anything but the transparencies yet, or I would visually share my troubles. Or lack of troubles. The transparencies are gorgeous on the light box when they are doubled up. Any and all wisdom on the handling and care of graphic arts film would be appreciated.