The main factors causing the deterioration of Tea include: One, light. Two, temperature. Three, moisture content of the tea. Four, atmospheric humidity. Five, oxygen. Six, microorganisms. Seven, Odor contamination. Microbial-induced spoilage is influenced by factors such as temperature, moisture, and oxygen, while odor contamination is related to the storage environment.

Therefore, to prevent the deterioration of tea, we must control light, temperature, moisture, and oxygen. The packaging material should be able to block light, such as metal cans or aluminum foil laminate bags. Oxygen can be removed by vacuum packing or nitrogen flushing, or by using a deoxidizer. There are two main ways to store tea based on the temperature of the storage space: normal temperature storage and low-temperature storage.

Given that tea has a strong ability to absorb moisture, regardless of the method of storage, the relative humidity of the storage space should ideally be controlled at under 50%, and the moisture content of the tea during storage should be kept below 5%.

The primary environmental conditions affecting the degradation and aging of tea are temperature, moisture, oxygen, light, and their interactions.

Temperature: The higher the temperature, the more likely the appearance of the tea will turn brown. Low-temperature refrigeration (freezing) can effectively slow down the browning and aging of tea.

Moisture: When the moisture content in tea exceeds 5%, it accelerates the deterioration and discoloration of the tea.

Oxygen: The oxidation of substances that cause the deterioration of tea is associated with the presence of oxygen.

Light: Exposure to light has an adverse effect on tea. Light accelerates chemical reactions in tea, and chlorophyll fades when exposed to light.

Tea is highly hygroscopic and odor-absorbent, easily absorbing moisture and odors from the air. If stored improperly, it can lose its flavor within a short period, and the more delicate and highly fragrant the tea, the harder it is to preserve.

Generally, after being stored for some time, tea undergoes changes in aroma, taste, and color, losing its fresh quality and developing a stale flavor. Therefore, mastering the proper storage methods to ensure the quality of tea is essential in daily life.