I know this is very late but I have been having a reticulation problem with the Rockland Colloid tintype materials since I began. I normally make the developer with distilled water but was making the fix with tap water. No matter what temperature the chemicals were I was getting reticulation. I have no gone to making the fix too with distilled water and no more reticulation. I have a salt based water softening system in my home and I guess the AG-plus will not tolerate that.
The emulsion peeling off the plates in the summer heat is another story.....