Does a Sour Taste Mean Chenpi Was Sulfur-Fumed

A sour taste does not necessarily mean sulfur fumigation. It can also come from natural components, maturity, processing, or storage conditions.

Common Sources of Sourness

1. Natural organic acids: younger chenpi tends to be more sour, and acidity often softens with aging;
2. Maturity differences: green peel is more sour, while fully red peel is less so;
3. Storage: overly sealed conditions can affect flavor, while moderate ventilation helps maintain stability.

Signs of Possible Unusual Processing

1. Pungent, chemical-like odor;
2. Unnaturally bright and uniform color;
3. Cloudy infusion or abnormal color when brewed.

Overall, sourness alone is not proof of sulfur fumigation, but unusual odor or appearance warrants caution.