Sheet film developing reel 4x5 for Paterson tanks
Sheet film developing reel 4x5 for Paterson tanks
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Sustainability Promise
All our products are made from PLA – a material derived from sugarcane and corn that is 100% biodegradable.
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Free shipping in Germany
With free shipping to your home in 2-3 days.
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30-day money-back guarantee
You can test any product for 30 days. If you are not satisfied, we will refund the full purchase price including shipping costs. No ifs, ands, or buts.
- Multiple sheet large format film at once: The MK2 spool holds up to 6 sheets of 4x5" large format film and fits directly into existing Paterson tanks.
- Chemical changes in dimmed light: In the Paterson Universal (PTP115), the included light trap seals the tank, allowing you to switch developer, stop bath, and fixer without a full darkroom.
- Film guidance without overlapping: The design keeps the sheets spaced during agitation, minimizing the risk of emulsion damage.
- Works with all Paterson tanks: In the PTP115 with light trap (without original funnel), and in the Multi-Reel tanks PTP116/117/118 directly with the original funnel — without light trap but still light-tight.
The spool design is a modified version of a freely available template by Evan Dorsky (CC-BY) on Printables.
Compatibility
Suitable for users of the following 4x5 large format cameras:
- Intrepid 4x5
- Graflex Speed Graphic / Crown Graphic
- Linhof Master Technika / Technika IV & V
- Sinar F1 / F2 / P2
- Chamonix 45 series
- Toyo-View 45 (e.g., 45A, 45CF)
- Wista 45
- Horseman 45
- & many more
Tank overview:
| Your tank | Setup |
|---|---|
|
Paterson Universal (PTP115) The most common tank for 2x 35mm or 1x 120 |
4x5 spool + our light trap (without original funnel). Chemical changes possible in dimmed light. |
|
Paterson Multi-Reel 3 (PTP116) Paterson Multi-Reel 5 (PTP117) Paterson Multi-Reel 8 (PTP118) |
4x5 spool without our light trap, with the original funnel. The spool may have some play (rattle) in the larger tank but remains light-tight. Chemical changes in the dark. |
Scope of delivery
- 1x MK2 4x5" large format film development spool
- 1x light trap (for use in the Paterson Universal PTP115)
Technical details
- Material: Plant-based bioplastic (PLA+)
- Capacity: Up to 6 sheets of large format film (4x5 inch)
- Construction: MK2 design with improved film guidance
Description
With this development spool, you can develop 4x5 large format film in your existing Paterson system without purchasing a dedicated large format tank system. In the Paterson Universal tank (PTP115), the included light trap replaces the original funnel, allowing you to switch between developer, stop bath, and fixer outside the darkroom in dimmed light.
In the larger Multi-Reel tanks (PTP116, PTP117, PTP118), the spool works without a light trap directly with the original funnel — the tank remains light-tight in this configuration as well. The spool may have some play and rattle there, but this does not affect the light-tightness.
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