Open Hardware Reels: A Better Way to Develop Film
I have designed a new type of open-source film developing reel specifically optimized for 3D printing. While many designs exist online, most are not tailored for home manufacturing, leading to failed prints or poor functionality. These reels are fully compatible with the standard systems like Paterson system and can be printed at home using common materials like PETG without supports and from two pieces.
Thoughtful Design for 3D Printing
The core philosophy of this project was to simplify the manufacturing process while improving the user experience. By using a two-part design that prints without supports, I’ve ensured that anyone with a modern 3D printer can produce a high-quality, functional tool.
Key features include:
- Beveled Edges: The spiral and support structures use specific angles so that the film only touches the edges, preventing it from sticking when wet.
- Integrated Finger Grooves: These allow you to manually guide or “pinch” the film during loading, making it much easier to handle without a dedicated loading jig.
- Safety Trap Mechanism: A square-edged “trap” at the end of the spiral ensures the film stays securely locked inside and cannot unwind during development.
Versatility and Future Growth
These reels are part of a larger mission to create accessible open hardware for the film community. Because the design is parametric, it can be easily adjusted for different formats. While the current version is built for Paterson tanks, I am working on expanding the lineup to include:
- Jobo-compatible designs.
- 110 film and IMAX 65mm reels.
- 70mm film reels
By moving toward open-source hardware, we can ensure that film development remains accessible and customizable for photographers everywhere. You can find the STEP files and project updates on my web shop to start printing your own.
Downloads:
Overview of function and design and discussion of the concept
Functionality overview and main principle discussed in this video