so I have just started taking pictures with my new-to-me Hasselblad 501C and have exposed one film. I removed it from the film back but don't know what to do with it. It isn't like 35mm film with its own canister. Do I use an elastic band to keep the roll tight? Do I put it in an old sock and keep it in my sock draw until I am ready to get it processed? I really don't know.