Thanks for the replies. The problem negatives are all from the same roll. I shoot mostly large format and thus have a little more control over individual negs, but some of my favourite negatives are from several rolls of 120 that I shot about 10 years ago in an old locomotive repair shop in southwestern Ontario. It was very dark inside but the windows - and there were plenty - were extremely bright, and even with reduced development, are almost impossible to print,
I did some tests today and it looks like the water bath technique might be the right choice. I used Dektol 1:4 and used Graves' suggested starting point:
- agitate in developer for 15"
- transfer to water bath, face down, for 60", no agitation
- agitate in develop for 10"
- transfer to water bath, face down, for 60", no agitation
- repeat the last two steps until the total time in the develop is about 2/3 the normal time in this developer
As I said, so far so good. The mid and especially lower values look really nice and there is faint and very fine detail in the windows, although I still want a little more.
Flashing is not an option right now, until I get my second enlarger up and running, but it is definitely something I want to try with these negatives.
I hope to post some results fairly soon.