… Photographic plates and film in the flat, sensitised, unexposed, of any material other than paper, … paperboard or textiles; instant print film in the flat, sensitised, unexposed, whether or not in packs. …
Explanatory notes
… generally coated with a sensitising photographic emulsion. These may be made of any material except paper (e.g., paper … commonly used are glass and cellulose acetate, poly(ethylene terephthalate) or other plastics (for film packs or cut films), and metal or stone (for photomechanical processes). Certain plates, which when exposed and processed …