Packaged tea leaves can be stored for several years

Packaged tea leaves can usually be stored for 1-3 years without opening and properly stored. The actual shelf life is affected by factors such as the type of tea, packaging material, and storage environment.

1. Types of Tea

The degree of oxidation of different tea leaves determines the difference in shelf life. Green tea is not fermented and has a short shelf life, usually 12-18 months; Half fermented oolong tea can be stored for 2-3 years; Fully fermented black tea and post fermented black tea have a longer shelf life, up to 3 years or more. Pu erh tea and other compressed teas can be stored for a long time under suitable conditions.

2. Packaging Material

Aluminum foil composite bag nitrogen filled packaging can effectively isolate oxygen and moisture, extending the shelf life of tea to the marked period. Ordinary plastic packaging has high breathability, and tea leaves are prone to moisture and spoilage. Sealed storage of ceramic or tin cans is suitable for long-term storage, but attention should be paid to avoiding light and moisture.

3. Storage environment

The temperature should be controlled between 0-5 ℃ for optimal refrigeration, and storage at room temperature should be below 25 ℃. The humidity should be kept below 50% to avoid storage with odorous items. Light can accelerate the oxidation of tea leaves. It is recommended to use dark packaging or store in a dark place.

4. Sensory judgment

Tea leaves that have exceeded their shelf life and show obvious mold spots, odors, or cloudy tea soup should not be consumed. Slightly aged Pu erh tea and other black teas may have a richer flavor, but green tea can produce a stale and astringent taste after spoilage.

5. Special treatment

Vacuum packaging can extend the shelf life by 30% -50%, but it should be consumed as soon as possible after opening. Adding food desiccants can effectively prevent moisture, and independent small packaging is more conducive to preservation than large packaging. Some tea leaves can be partially restored to their original flavor through roasting.

It is recommended to store tea leaves in a cool and dry place, and consume them within 3 months after opening. Regularly check the condition of the tea leaves. If moisture is found, place them in a clean pot and slowly roast them over low heat to remove moisture. Different types of tea should be stored separately to avoid mixing flavors. Before drinking, pay attention to observing changes in tea color and aroma. For high-value tea, it is recommended to use a professional tea refrigerator for storage, with a temperature set at around 0 ℃ and a relative humidity controlled below 60%.