Ok... this is an OLD thread... but seeing as I'm the one who started it, I might as well finish it.
It's amazing how easily I get sidetracked. I finally returned to this film after nearly four years, and picked up right where I left off. I tested a couple of sheets in HC-110 and got the same deep fog as before. (not appreciably worse, at any rate) I tried a quick bath in Farmer's, and did cut the fog, but also reduced everything else on the sheet. No better than before.
So I tried adding 10ml of 10%KBr to 500ml of HC-110 Dil-b and Eureka! Not a magic bullet, but the fog is cut by about 75%, while still having reasonable contrast and I have negatives I can print.
I did shoot the same scene with FP4+ and the HP4 came out only a little underexposed in comparison. I think that I can rate the HP4 at 200 and get some reasonable results.
Question for those who know this kind of thing... Now that I've resurrected this film, I'm wondering if there are tweaks to improve it even more. Could I get similar/better results by adding Farmer's A solution (ferri)?
I like when things work out.