Tank Volume

I've never had to think about this in my years of B&W processing, mostly because of my using the same films & developers for so long. I was getting ready to load some tanks for tomorrow and realized I would have to put 1 reel of 35mm in a 16oz. tank.

Will using 8oz. of chemicals in a 16oz. tank cause any problems, such as over agitation or too many bubbles?

Cancel that question. I just realized that 8 more ounces of one-shot developer would cost 25 cents. Getting a little sleepy I guess.

It amazes me how quickly answers are found here at P.net!:D

Yes indeed. Apparently it's populated with geniuses!!

If you agitate by inversion, the tank must be full of liquid and the single reel of film with three empty reels. At least half full of developer if you agitate by rolling. I haven't used a reel by spinning since 1957 (junior high).

Thanks Ed. By the way, my first developing tank was a spinning reel type also. 1973.

Now that I'm thinking about it, the draining and filling was faster and smoother without snap-on lids.

Developing continues as long as the film is still wet. The time to fill and time to empty effectively cancels out. I think agitation by inversion is more consistent than spinning, and less likely dislodge the film from the reel. It's easy to over-agitate in either case, and a excessive air space will amplify agitation.

No doubt. I've been all stainless steel for decades.