For these situations, mixing conditions are avoided that introduce bubbles, and antifoamants are present to suppress bubble formation.

In modern making and coating, the addition of solid or even bloomed gelatin is avoided. With modern wash methods, gelatin is added at between 12.5% and 22% (the latter as either pellets or as a syrup). The volume is then readjusted during the wash operation to give the desired volume and gelatin content. This is usually 1 kg / mole of silver and between 5 and 10% gelatin.

I have never heard of nor experienced the change in bonding Charles. Perhaps it takes place with some gelatins. I do know it happens if you heat the gelatin too much under extremes of pH, either acid or alkaline or if you heat the gelatin over 70C for an extended period. I avoid all of these.

PE