In my fist posting about tapioca film (http://www.thequenelle.com/2009/05/tapica-starch-film.html) I had developed a method to extract the mucilaginous starch from tapioca pearls. Very complicated to an extent. But then it occurred to me that using plain tapioca starch might work as well if not better. The proportion is about 5 parts water to one part tapioca starch. They are both boiled together until the liquid is translucent and thick. Then it is spread onto a sheet of thin Plexiglas to dry out in a dehydrator. It worked much better and gave a higher yield than the initial method did.
This film was made with a sweetened hibiscus and strawberry infusion and tapioca starch. It needs to dry for a good 12 hours.