Image: Brett Pellicle Formation During Fermentation
Published: November 4, 2026 at 7:45:17 PM UTC
Close-up view of Brett pellicle formation on amber fermentation liquid, showing irregular cream-colored films, folds, strands, bubbles, and exposed liquid.
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Image description
A close-up, landscape-oriented photograph shows the surface of an amber-brown liquid inside a large stainless-steel vessel. Much of the liquid is covered by an irregular pale cream to off-white surface film or pellicle. The film varies considerably in thickness and appearance: some areas form broad, smooth, semi-translucent sheets, while others are opaque, wrinkled, folded, web-like, or fragmented into small patches. Thin strands and branching lines connect portions of the film across exposed areas of liquid. Numerous openings in the surface layer reveal the clear amber to golden-brown liquid beneath. Small bubbles and bead-like formations are visible along some edges of the film, particularly where the pale material meets exposed liquid. The surface has a wet, glossy appearance, with highlights reflecting from both the liquid and the film. The foreground contains some of the largest and most detailed folds and sheets, while the surface becomes progressively softer in focus toward the rear of the vessel. The curved stainless-steel wall is visible along the upper edge and sides of the image, and a broad section of the vessel rim appears out of focus across the lower foreground. The metal has a brushed, reflective silver-gray finish with warm reflections from the brown liquid. The composition is dominated by the fermentation surface, photographed from a low, slightly downward angle that emphasizes its texture and irregular patterns. No people, tools, labels, logos, brands, or other objects are visible. There is no readable text in the image. The precise composition of the liquid and surface material cannot be determined from appearance alone; visually, the image depicts the irregular surface film associated with the requested Brett pellicle formation during fermentation.
The image is related to: Fermenting Beer with Wyeast 5112 Brettanomyces Bruxellensis Yeast