Lost the end of your film, want to do double exposures, no specialist tools in sight?? No problem!
Firstly you’ll need a piece of negative strip, (about 6" is plenty), scissors, craft knife, a form of tape (masking is best, but electricians tape works too, and the roll of film you want the end of.
First take your strip of negative and put a piece of tape down the middle of it (about 3 inches long) then cut two or three ‘windows’ in this, then tape over the windows again, so you end up with sticky holes on the underside.
The tricky bit now is threading the ‘retriever’ into the canister of film, keep pushing it until it goes in and eventually you should be able to tell when the tape sticks to the end of the roll.
Then simply pull it back out, and voila! Your film retrieved!