When tasting or purchasing Xiaoqinggan, many tea lovers are often confused by a thin layer of "white frost" covering its surface. What exactly is this frost? Is it better to have it or not? Below is a detailed professional explanation.
What is the "White Frost" on the Surface of Xiaoqinggan?
The white frost on the surface of Xiaoqinggan is a natural physical phenomenon, not a quality issue or a sign of expiration.
From a biological perspective, this white frost is essentially the fruit wax inherent to the citrus peel, also commonly referred to in the industry as "white powder." During the growth of the fruit, a certain amount of fatty acids accumulates on the surface of the peel, which solidifies to form this thin film as the environment changes. It serves a natural moisturizing and protective function.
Does White Frost Mean Better Quality?
For Xiaoqinggan, the presence of white frost is often a strong indicator of freshness.
Generally, only when the fruit is vibrant and at the appropriate stage of full maturity will it secrete enough fruit wax to lubricate the peel surface, preventing excessive evaporation of moisture and resisting the invasion of external pests and diseases. Therefore, Xiaoqinggan with a uniform white frost usually represents fresh raw materials and superior quality.
Comprehensive Standards for Selecting Xiaoqinggan
While white frost is a reference indicator for freshness, it should not be used as the sole standard for judging quality.
Some varieties of Xiaoqinggan, due to differences in growth environment or tree age, naturally secrete less fruit wax. Even without obvious white frost, their quality can still be excellent. When picking, a "comprehensive evaluation" approach should be taken:
- Color: Whether the peel color is natural;
- Shape: Whether the fruit shape is full and consistent;
- Aroma: Whether the citrus fragrance is pure and elegant.
Summary Advice: The white frost on Xiaoqinggan is a symbol of its freshness and natural state; products with white frost are often of higher quality. However, as a mature tea enthusiast, one should also consider appearance, aroma, and taste comprehensively to select the most satisfying and delicious Xiaoqinggan.