Xray film hand rolled onto 120 backing paper: Kodak paper specifically is completely ruining the rolls but not ilford etc?

[MCB18]

One plausible reason could be that Kodak films don't have gelatine in the non-emulsion side whereas OP's film being a double sided emulsion has gelatine as noted in post #11. Now, with exposure to ambient moisture, the gelatine in the double-sided xray film could be locking up with some stuff in the backing paper.

I believe that most Kodak films do have at least coating on both sides for anti-curl and artistic layers

 

[mshchem]

Empirical, non-scientific, uncontrolled. Doesn't matter unless you roll your own, so to speak