Response to presoaking film

I went thru a terrible spell of air bells on ny negs. I tried presoaking (up to 5 min!) and thought that it had solved my problem. Then I got the air bells back and stopped the nuisance of presoaking. I've since solved my problem. I was using a patterson 2 reel tank. I'd develop 2 rolls, then develop another 2 rolls immediatly after the first 2 were finished. I would re-use all the same chemicals, including the developer. The 1st 2 rolls would come out perfect but always the 2nd two rolls had air bells. I suppose I introduced air pockets into the dev while agitating the 1st 2 rolls. I now mix fresh dev for every 2 rolls and have not had a problem since. I also got a 5 reel tank and dev 5 rolls at once. Much faster! Regina

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