Giải thích thuật ngữ: Water Activitylà gì?

Water Activity (Aw) measures the amount of unbound water in coffee beans that can evaporate or participate in chemical reactions. This factor directly impacts coffee’s stability and shelf life, playing a crucial role in maintaining quality during storage.

Since water promotes microbial growth and oxidation, Aw is measured on a scale from 0 to 1. The higher the value, the greater the risk of flavor degradation and quality loss. To preserve freshness and extend shelf life, the ideal Aw level should be kept below 0.55.

In the Specialty Coffee industry, controlling Aw not only prevents mold and spoilage but also stabilizes bean structure and preserves distinctive flavors. For this reason, producers must carefully monitor Aw to ensure their coffee meets the highest quality standards.

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