This standard BS ISO 14808:1997 Photography. Composition of 135-film canisters is classified in these ICS categories:
37.040.20 Photographic paper, films and plates. Cartridges
This International Standard specifies the material composition and marking for canister bottoms and lids for the 135-size film format products. This International Standard also specifies the limitation on materials used for pigmenting the canisters.