Scott, thanks for the reply. These are not air bells -- I've dealt with them before and know what they look like and how to avoid them. I use several drops of Edwal LFN in the developer to reduce surface tension, and I rap the tank sharply after pouring in the developer, and after each agitation.(posted 8655 days ago)These marks are shaped differently than airbell marks. These tend to be elongated rather than round and have a distinct white boundary with a dark dimple in the middle -- airbell marks are round shapes with a soft border. Yes, I can re-wash the film, which softens and swells the emulsion, but the drying marks just occur again, in a different location.