In hot summer, a cup of hot tea can not only make people feel hot, but also has a health care function. So how to preserve tea in summer, let's take a look.

How to preserve tea in summer and some problems that should be paid attention to in tea storage

1, moistureproof

The water content of tea should not exceed 5%, and 3% is the best for long-term storage. Otherwise, tea polyphenols, chlorophyll and other substances in tea are easy to decompose, and the color, aroma and taste of tea will change, especially when the temperature is higher, the deterioration rate will accelerate.

2. Oxidation prevention

The oxygen content in tea packaging must be controlled below 1%, and too much oxygen will also lead to oxidative deterioration of some components in tea.

Step 3 avoid light

Because tea contains chlorophyll and other substances, when packaging tea, it must be shaded to prevent chlorophyll from photocatalytic reaction with other components. In addition, ultraviolet rays are also an important factor leading to the deterioration of tea.

4, sealing

The fragrance of tea leaves is easily lost, so it is necessary to use materials with good air tightness for fragrance-preserving packaging. In addition, tea is easy to absorb the smell of the outside world, so that the fragrance of tea is infected. Therefore, the odor produced by packaging materials and packaging technology should be strictly controlled.

Tea storage method in summer: 1. Fresh-keeping in refrigerator: put the tea leaves in a dry, tasteless and sealable container bottle and put them in the freezer of the refrigerator. If the amount of tea leaves is small and very dry, it can also be packaged and sealed in a double-layer film bag with good moisture-proof performance and put in the refrigerator.

2, tin storage method: put the tea leaves in an iron teapot with a double cover, it is best to fill it without leaving a gap, so there is less air in the pot. The double-layer lid should be tightly covered, the gap of the lid should be glued with adhesive tape, the tea pot should be put into a double-layer nylon bag, and the mouth of the bag should be sealed to achieve the best storage effect.

3. Storage method of the composite bag: put the tea leaves into the composite bag, squeeze out the air in the bag, seal the bag mouth with a sealing machine, put on a plastic bag, tie the bag mouth tightly, and put it in the refrigerator for cold storage.

4, thermos storage method: put the tea into a dry thermos, cover with a cork, sealed with white wax, and then sealed with tape.

Please pay attention to saving time:

1, and the shelf life of tea is generally 18 months. Drinking tea after the shelf life will have a bad effect on your health. Generally, the shelf life of sealed tea leaves is 12 months to 24 months.

2, but there are exceptions. The older Yunnan Pu 'er is, the more fragrant it is, and the shelf life can reach 20 years.

3. Bagged tea is safer than bulk tea. It is usually judged whether the tea is expired or not, and it can be seen whether it is moldy and stale; Will green tea turn red and soup turn brown and dark? Whether the concentration, convergence and freshness of the taste are reduced.