I'm finally somewhat comfortable with shooting and developing black and white film (35mm, 120, and 4x5). I've made a lot of mistakes but things are going well enough that I'm ready to start making new mistakes
I intentionally went out looking for a scene where I could try N+ or N- developing. As it turned out I found a scene that needed N-2 developing. No problem. I made the image and brought my test film home to develop it. I started trying to figure out what N-2 equated to in units of time. Well... there are a lot of rules of thumb on the web but the bottom line is I need to test my film. Ilford HP5+ (4x5) in this case.
One sheet was fine with normal developing and the other I winged and instead of developing at 9m in DD-X 4:1 I developed it for 5:34 (that might not be the exact time but it's close). The two negatives are drying and it'll be tomorrow evening before I can scan them. I'll post results when I get them scanned.
What is the process for coming up with N+ or N- times for a specific film and developer?
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