Philip Chapman-Bell replied to my message. He answered that he has folded the material I'm inquiring about for years, particularly wallets.
Thank you for your answer Philip. Would you please show me pictures of a couple of your folds made from this material. I'd appreciate it. Do you know its technical name? What's the biggest sheet you've folded of it? Might you know how to acquire a sheet of 120 cm x 120 cm (47 ½ x 47 ½ in) of that material? Thank you in advance. -- Gerardo gerardo(a)neorigami.com