It might be useful to contact DuPont as well. I do not have the number here,
but I will try to put it online next week.
DuPont offers a service called DuCare that recycles all types of silver
bearing materials. It takes films, extracts thje silver and recycles the
polymer backing. And it offers silver removal cartridges which are recycled
as well, I think. It might be a good source.