Quote Originally Posted by Photo Engineer View Post
I have no idea what would mediate between the gelatin and the Pt/Pd coating. I do know that you should be able to harden any subbing layer to prevent it from washing off.

PE
some time ago, one my colleague working with polymers told me that a suitable hardener for PVOH would be succinic acid anhydride or something analogous (i.e. polycarboxylic acid anhydrides)-but there are also other variants/chemistries to work with