Outer coating on 10BP4 peeling

[bgadow]

I agree, interesting information. There were bw tubes made that way, mostly in the sixties, but it was more common with color. There is a good thread out there detailing all the methods of repairing cataracts on those bonded tubes. I recall speculation in the past regarding what was originally used and how it was done. It would seem that cost would be the stumbling block here.