Wing-Lynch Model 4 C41 E6 BW Darkroom Film Processor w/ 4 Unicolor Modules

Wing-Lynch Model 4 C41 E6 BW Darkroom Film Processor w/ 4 Unicolor Modules

The Wing-Lynch Model 4 is an automatic darkroom film processor designed to develop color negative (C41), color slide/transparency (E6), and black-and-white films using a rotating drum tank system and programmable chemical sequencing. Manufactured by Wing-Lynch Inc. of Beaverton, Oregon, the Model 4 is a self-contained freestanding cabinet unit that manages chemical delivery, timing, temperature, and drum rotation through its built-in control electronics. This unit is being sold AS-IS — we do not have the specialized expertise to test or evaluate it, and no functionality is guaranteed.

Specifications & What's Included

• Make: Wing-Lynch Inc., Beaverton, Oregon, USA
• Model: Model 4
• Compatible processes: C41 (color negative), E6 (color slide/transparency), Black & White
• U.S. Patent: 4,000,465
• Form factor: Freestanding wood-grain laminate cabinet on heavy-duty casters
• Control panel: Pressure gauge, timer dial, multi-step LED step indicator, Start button, Bypass switch, Volume and Dump controls, Chemical Level indicator
• Chemical storage: 9 labeled acrylic reservoir bottles (C41 and E6 chemistry positions labeled)
• Processing drum: Large cylindrical acrylic drum tank with multiple inlet/outlet ports and white plastic end rings
• Interior: Main control PCB, solenoid valve bank, relay assembly, wiring harness — all appear present
• Included plug-in program modules (4 total):
• Dump Module (Unicolors) — tank selector, upper/lower deck controls
• B&W Unicolor module — Dev/Normal/Preheat programming dials
• K-2 Unicolor C-41 2-Step module — Presoaks, Dev, Fixer, Wash programming
• RS41 Unicolor C-41 Process module — Presoak, Dev, Bleach/Fix, Wash programming
• Shipping: Local pickup or freight shipping ONLY — standard parcel carriers not available for this item

Applications

The Wing-Lynch Model 4 was designed for professional darkroom labs, portrait studios, and serious amateur photographers who needed consistent, repeatable film processing results without hand-processing each roll. The drum-tank design allows daylight processing of exposed film: the film is loaded onto the drum in darkness, the drum is sealed, and all subsequent chemical steps are handled automatically by the machine in normal room light. The interchangeable plug-in program modules are what make the Wing-Lynch system flexible — each module stores the complete chemical sequence, timing, and temperature programming for a specific film process (C41 color negative, E6 slide film, B&W), so switching between processes means swapping the module. Wing-Lynch machines like this were used in professional photo labs, university photography departments, and by dedicated darkroom enthusiasts during the 1970s and 1980s, when automated minilab equipment was expensive and rare, and a machine like this represented a significant step up from fully manual processing. This model dates from that era — the design, controls, and Unicolor module branding are consistent with late-1970s/early-1980s production. Today, surviving units are sought by film photographers, darkroom restorers, and collectors of vintage photographic equipment.