Just finished a film test with Ilford HP5 using Pyrocat-HD [1:2:100] at 75 degrees in BTZS tubes for 4, 5.5, 8, 13 and 18 minutes. All had excessive fog, from 0.31 to 0.65 on step 21 with the Stouffer step tablet. Previous tests had 0.09 to 0.20 on step 21. The film was purchased in late November and the developer mixed in mid December. In my panic the first conclusion is that UPS may have x-rayed the film when I shipped it home after a photo trip. The densitometer was re-calibrated and gave the same readings from the earlier tests. Are there any other factors that I may have overlooked?? Thanks!!
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