What flavor result occurs if tea bags are left in the sun tea container past the point of reaching the desired dark color?
Answer
Bitterness due to over-extraction.
Tea leaves contain numerous compounds that dissolve into the water at different rates. While the initial slow steeping extracts desirable flavors and aromas, prolonged contact with the water, especially after the tea has reached its peak visual strength (being dark enough to barely see through), leads to the extraction of tannins and other bitter compounds. This extended exposure results in over-extraction, which manifests as an unpleasant, sharp bitterness in the final beverage. Therefore, it is crucial to promptly remove the tea material immediately once the target color is achieved, irrespective of whether the brewing occurred in the sun or shade.

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