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Hi, I did the whole testing process, and shot about 50 4x5 negatives this past summer based on those tests, using the ExpoDev software on my Palm. I am back in the darkroom now, processing those negs, and they are all way underdeveloped. The highlights are in the range of 0.9. I had a feeling something was wrong, because ExpoDev was telling me that for HP5+, at an SBR of 8.4, the development time should be four minutes! Well, I did that and got the predictable result: underdeveloped highlights.
Where did I probably go wrong in the testing process? I used distilled water, processed test and regular negs at 68 degrees in tubes, etc. I was unsure of whether I exposed the test negs correctly, though. My incident meter only reads down to about 3, and it's a small, cheap one.
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