How does weather variability affect the duration of traditional soy sauce brewing?

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Weather Variability Extends Traditional Soy Sauce Fermentation Periods

The traditional brewing of soy sauce at the San Kwan Loong Soy Sauce Factory is directly influenced by weather conditions, with rainy periods necessitating a longer fermentation process. Unlike mass-produced alternatives, each batch of this handcrafted soy sauce requires a significant time investment, typically spanning three to four months for completion. This duration is not fixed and is subject to natural fluctuations, particularly the impact of rainfall on the fermentation cycle.
Extended Fermentation Due to Rain

When inclement weather, specifically rain, occurs, the natural fermentation process is prolonged. The containers holding the fermenting mixture must be covered to protect them from the rain. This protective measure, implemented until weather conditions improve, directly extends the time required for the soybeans to ferment adequately. This contrasts with ideal sunny conditions, which allow for a more consistent and predictable fermentation timeline.
Natural Fermentation Under Sunlight

The core of the traditional soy sauce production at the Kam family's factory relies on natural fermentation driven by sunlight. Imported soybeans are boiled, cooled, and then mixed with flour. This mixture is subsequently exposed to the sun, allowing natural fermentation to commence. This method, passed down through generations, emphasizes patience and a reliance on environmental factors rather than accelerated industrial processes.
Time-Intensive Batch Production

The entire process for a single batch of soy sauce at this Jelutong-based factory takes between three and four months. This extended period is a direct consequence of the natural fermentation method employed. Following the initial fermentation of the soybean and flour mixture, salt water is added, and the brewing continues naturally until the desired rich, dark colour is achieved. This meticulous, time-consuming approach is a hallmark of traditional craftsmanship.

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How does weather variability affect the duration of traditional soy sauce brewing?

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