Quote Originally Posted by Photo Engineer
In the early days of photography, emulsions were unhardened or poorly hardened. This led to the formation of bubbles by reaction of carbonate from developer carryover to the acid in the stop bath or acid fixer. The reaction with an acid fixer can take place even with a short rinse of water.

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I have used acid stops for film and paper for over 30 years with absolutely no problem, but have had problems of one sort or another with using a water rinse after development.

I will continue to use an acid stop.

PE
Thank you for that information! I've been educated. A prior poster described the proper way to fill a development tank (developer just above the level of the reels or single filled reel in a multi reel tank). I had no idea. I had been under the impression that the more developer you pour into the can, the better.