★ How to Store Tea in a Cold Storage Room

Tea is a "delicate" product that is extremely sensitive to temperature, humidity, light, and odors. Many tea merchants face this dilemma: premium teas purchased at high prices lose their aroma, become bland in taste, and even develop a stale flavor after just a few months of storage — the problem often lies in the storage environment.

The correct method for cold storage of tea is to control the storage environment temperature below 5°C. Depending on the storage duration, we recommend:

Short-term storage (within 6 months): Use a fresh-keeping storage room at 0–5°C, which is cost-effective and meets the preservation needs of most teas.

Long-term storage (over 6 months): A freezing environment of -10°C to -18°C is recommended, as it more effectively delays the oxidative deterioration of tea's internal components.

Key Considerations:

A dedicated cold storage room must be used. If storing alongside other foods, ensure airtight packaging, as tea has strong adsorption properties and readily absorbs odors.

Good air circulation within the storage room is essential to maintain uniform temperature.

When purchasing tea in bulk, divide it into small packages (or tins) before placing it in storage. Take out only the required amount each time, and avoid repeatedly freezing and thawing the same batch of tea.

When removing tea from cold storage, allow the tea container to naturally return to near room temperature before opening it. Otherwise, sudden exposure to heat will cause condensation on the container's surface, increasing the tea's moisture content and accelerating the deterioration of the remaining tea.

★ 4 Key Factors for High-Quality Tea Storage

1. Tea Moisture Content
Moisture is the medium for chemical reactions within tea. The higher the moisture content, the faster the tea ages, manifesting as yellowing of color and a decline in freshness.

Ideal range: 3%–5% (for green tea, etc.)

Warning level: Above 7%, no preservation technique can salvage the quality

Danger level: Above 8.8%, mold growth is highly likely

2. Storage Temperature
For every 10°C increase in temperature, the rate of chemical reactions doubles. Low temperature is the most effective means of delaying tea deterioration.

Premium green tea: 0°C–5°C

Oolong teas such as Tieguanyin: Approximately -15°C can preserve color and aroma over the long term

3. Light
Light exposure triggers photo-oxidation of chlorophyll, causing green tea to fade and turn yellow, while also catalyzing aromatic compounds to produce off-flavors such as "sun-dried taste." Storage away from light is a mandatory principle.

4. Air Humidity
Tea is a natural hygroscopic material. When ambient humidity exceeds 80%, the moisture content of tea can rise above 10% within a single day.

Recommended relative humidity: 30%–50%

Packaging materials must have low moisture permeability to block external humidity.

★ Tea Cold Storage Room Design Solutions

Panel Configuration: 75mm or 100mm thick polyurethane double-sided color steel insulation panels (steel plate 0.50mm) are recommended, offering excellent thermal insulation, moisture resistance, and sealing performance.

Temperature Design:

Storage period ≤ 6 months: 0°C to +5°C

Storage period > 6 months: -10°C to -18°C

Customized tea cold storage room design solutions can be provided based on tea type, storage volume, and expected duration, ensuring that the "freshness, aroma, taste, and appearance" of every tea leaf are optimally preserved.