Jim, use EI:80 for FP-4. Develop for 13 minutes @68F (11 3/4 @70F.) Continuous agitation for the first 30 seconds, 5 sec every 30 seconds. Use distilled water to mix your working solution (this is more important than most people know, especially with pyro.) If your meter and thermometer/timer are accurate, you will have 'perfect' negatives.(posted 8851 days ago)