Richard:
This is an increasingly common problem with a number of video tapes as well. If, in past postings, you have seen me mention "binder-base adhesion failure"- this is what we have been calling the phenomena for the last few decades. ... Final comment- we developed a procedure to deal with binder-base adhesion failure about 10 or 15 years ago. Unfortunately, the procedure takes a few months and is only successful about 60% of the time.
With the work in tape restoration and recovery we have done over the last 23 years, we consider binder-base adhesion failure to be a much more serious, though less frequent, decay problem than binder hydrolysis.