Quick answer
Loading a 100ft bulk roll into a 35mm cassette requires a bulk film loader, a changing bag or darkroom, and careful handling to avoid light leaks or scratches.
Why bulk load your own 35mm film?
Rolling your own 35mm rolls from a 100ft bulk roll lets you control the number of exposures per cassette and saves money compared to buying pre-rolled film. For example, a 100ft bulk roll of Ilford FP4+ 125 costs about USD 155.25 and yields roughly 18 standard 36-exposure rolls, while individual rolls would cost more.
What you’ll need
You will need a bulk film loader (like a Lloyd or Watson loader), a changing bag or darkroom, empty 35mm cassettes, scissors, and tape. The film itself—such as the XP2 Super 400 or FP4+ 100ft bulk rolls—comes in a sealed can; open it only in total darkness.
Step-by-step process
- Prepare your dark space: Set up your changing bag or darkroom. Place the bulk film loader, the sealed film can, empty cassettes, scissors, and tape inside. Close all light sources. A single light leak can fog the entire roll. Double-check zippers and seams.
- Open the film can and load the loader: In complete darkness, open the film can. Pull out a few inches of film leader and feed it into the bulk loader's light trap according to the loader's instructions. Close the loader's lid securely. Do not touch the film surface; handle only by the edges to avoid fingerprints.
- Set your desired frame count: Most bulk loaders have a frame counter. Set it to 36 exposures (or fewer if you want shorter rolls). Turn the crank until the counter reaches the number. A 100ft roll gives roughly 18 rolls of 36 exposures. If you shoot sporadically, consider 24-exposure rolls to reduce waste.
- Cut and attach the film to the cassette: Still in darkness, cut the film from the loader with scissors. Take an empty cassette, pull out a short length of the film spool's paper leader, and tape the film to it. Wind the cassette gently to take up slack. Use a small piece of tape and ensure the film lies flat—bumps cause uneven winding and potential scratches.
- Seal the cassette and label it: Once all film is wound into the cassette, remove it from the loader. Apply a piece of tape over the film exit slit to keep light out. Write the film type and ISO on the cassette with a marker. Always label immediately; you won't remember which film is inside after a few days.
Film recommendations for bulk loading
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XP2 Super 400 35mm - 100ft Bulk Roll: XP2 Super 400 is a sharp, fine grain black and white film with extremely wide exposure latitude. Its forgiving latitude means you can shoot in varied lighting without worrying about exact exposure, making it a great all-rounder for bulk rolling.
XP2 Super 400 35mm - 100ft Bulk Roll
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Ilford FP4+ 125 35mm - 100ft Bulk Roll: FP4+ 125 offers very fine grain and outstanding sharpness, ideal for subjects with fine detail. If you plan to enlarge your negatives significantly, FP4+'s fine grain preserves detail better than faster films.
Ilford FP4+ 125 35mm - 100ft Bulk Roll
