Instructions
Collect all the used polyester film in one location. Designate a specific box or bag for the old film.
Find scrap film buyers in your area; Kodak provides a list in a PDF document.
Call a few buyers to determine which one is best for your purposes. Many buyers have pickup or mail-in services, and others have dropoff centers.
Seal film in an envelope if you're mailing it. For pickup or dropoff options, keep all film together in a bag or box. Address and mail the envelope or arrange for pickup or dropoff with the buying consultant you've contacted.