I have a feeling your film is underdeveloped. It might also be underexposed, as well. But usually, even with underexposed images, you'll have some areas of significant density--skys, bright highlights and so forth.(posted 8201 days ago)If the entire negative is dull and flat, it sounds more like the film just wasn't developed enough. I would recommend you check carefully the temperature and time and developer concentration. You could have bad thermometer, so compare it to another. Also, check to see that your dilution ratios are correct for the developer.