Sorry to post this (as I know it seems to come up alot on film forums).
I have a few rolls of 120 film that have been processed over the last couple of months. Most have been taken to my local lab, one was sent to Peak Imaging.
A couple of rolls seemed to show these blotches towards the end of the film, although the worst seems to have run right through every frame. My initial thought was that it was the processing (after reading various forums and finding similar issues), but I am less sure now, as the lab explained their process to me which sounds pretty water tight.
The film is in date and is stored in a map chest in a dry dark environment. And I have never noticed any dampness with any of the films. I am sure they have all been bone dry. My other thought is that maybe one of the film holders had some moisture in it, although again I have never seen any evidence of this.
Any help greatly appreciated.
Edit: I am using a Mamiya 645 and I have two separate film holders.
