I agree, but without analytical results on the emulsion do we know they contain Cd?
In any event, I think that there is enough confusion to remove this to PM status. This is a specialist topic. And since my experience differs from yours, it can be due to formulation. I do know, as I said in the PMs that Cd will not work with AgCl and AgBr, only with AgBr/Cl, and there only to control contrast. That is my experience and education.