Quote Originally Posted by Xia_Ke
it seems D-76 is recommended more if you plan to replenish and HC-110 is recommended more if you plan on single use
Glad to help! I never replenished D-76 but I wasn't doing a huge volume of it. I also never re-used it. I had a two-reel tank (35mm) and used a 1:1 dilution, so I'd take 250ml of the stock solution (which is what you get when you mix an envelope of D-76 with water per directions on the D-76 envelope) and add 250ml of distilled water. Might have been 230 of each, something like that. Trying to remember, but that was about 8 or 10 rolls of film per small envelope of D-76 - does that sound right? No problem to re-use fixer or stop bath, but all of this stuff has a shelf life - the Kodak book probably has a recommendation on when to change it. Trying to remember...

One more thought about mixing the 1:1 developer and water - buy the distilled water ahead of time so it's at room temperature which hopefully is about the same temperature you need for developing. If it's not, you can warm it in a water bath but that takes a little time (plastic dishpan filled with tap water of the temperature you want the chemistry at, set the beakers/containers in the dishpan). In the winter, buy the distilled water a day or so ahead of time - makes life just a little easier.

I'm sure you could get by with re-using the D-76 if you developed film using the stock solution (see Massive Dev Chart for times) or using 1:1 but that would mean another container of chemistry. That seemed like a variable to me - not knowing the strength of the re-used developer - and it wasn't one I got around to trying out.

You know, this thread has been a big help for me too. I haven't thought about this stuff in awhile and I guess it all comes back. So I can either thank or blame you!