A proper storage of Impossible film will allow you to make sure that it remains stable and to get the best results out of it.
Ideally, Impossible film packs should be stored in their own unopened packaging in a cool and dry environment. We recommend that you store Impossible films flat, in a fridge at a constant temperature. You can store the film at temperatures between 4 to 18°C / 41°F - 65°F (do not freeze!)
However, the film will not perform to specifications at cooler temperatures, so it must be allowed to return to room temperature before use.
Use this film within 12 months of the production date or before the ‘Best before’ date stamped on the packaging.