scott_flathouse

Thanks, Thomas, for the help. I may have answered my own question,

though. I briefly perused Kodak's data sheet for HC-110 (which I

should have done in the first place) and they list a development time

for solution A (1:15 dilution) for Tri-X at 4:15/68 deg. F and a

development time for solution B (1:31 dilution) for Tri-X at 8:30/68

deg. F. Essentially double the time for half the concentration, it

appears. Unfortunately they don't list development times for the

more dilute solutions. However, I believe I have a good starting

point now.

I'm wanting to experiment with dilute concentrations of developers (specifically HC-110) and was wondering what the relationship between deveopment time and concentration should be. For example, if I halve the concentration of developer, should I (roughly) double the development time? Or is there some logarithmic or other function I should be following?

So how did it turn out?

Thanks for the responses. I tried to be careful, and with 35mm it's

not such a big deal. But with 120, I was having a bit of a hard time

unrolling it without touching the film. And I guess I'll have to

postpone the Big Mac & fries until post-development...

I just finished developing several rolls of black & white film for the first time, with a lot of help from information off this forum (thanks a bunch everyone!). However, I was wondering if there were any adverse effects of getting fingerprints all over the undeveloped film in the changing bag during loading onto the reels. I'm guessing that any oils are washed off during developing, and I can't see any evidence on the finished negatives, but I thought I would ask.