What should I pay attention to when storing tea leaves in tea cans?

Moisture control. Water is the solvent that promotes the chemical change reaction of tea components, the more water, the more significant the diffusion and interaction of the beneficial components in the tea leaves, and the faster the aging and deterioration of the tea. So, to what extent is the water content of tea controlled most conducive to storage, the results of the study show that:

The optimal moisture content for tea storage is 3%. When the water content of tea storage is more than 6%, the deterioration of tea leaves is quite obvious. Taking green tea as an example, with the increase of water content, the water extract, tea polyphenols and chlorophyll related to the quality of tea decreased significantly.

The same is true for black tea, the higher the water content, the more theaflavin, thearubigin, tea polyphenols, and water extract decrease, and at the same time, theabrownin, which is not good for the quality of black tea, increases. To prevent the deterioration of tea during storage, it is necessary to dry the tea to within 6% of the water content, and it is best to control it at 3%-5%. The water content of tea can generally be estimated by the sense of touch, if you grab a pinch of tea leaves, gently rub them with your fingers, and immediately form a powder, indicating that the water content of tea leaves is within 6%, which is suitable for preservation.

If the tea is rubbed by hand can only make the tea leaves into a piece of the end of the shape indicates that the water content of the tea is more than 10%, this kind of tea is generally not suitable for purchase, or immediately dried, otherwise, within 10 days, the tea will change color.

Avoid contact with odor sources. Because tea contains palmitic acid and terpene compounds, tea has a strong adsorption effect. It is like a sponge absorbing water, and it can absorb all kinds of odors on itself.

If the tea is mixed with odorous items, such as tobacco, oil, cosmetics, pickled fish, camphor, etc., it will not take long to be contaminated, which will seriously affect the quality of the tea.

1. Green tea is a non-fermented tea, as long as the tea leaves are sealed in a tea can, covered with a plastic bag, sealed and put in the refrigerator.

2. Black tea is a fully fermented tea, which ages and deteriorates slowly, as long as it is stored in a closed and dry container Bilu, such as a clay pot.

3. The fragrant tea in oolong tea can be stored in the same way as green tea, and the strong aroma can be placed in a tin can.

4. Black tea (such as Pu'er tea) is a post-fermented tea, and the most important thing for keeping black tea is to keep it dry and ventilated, such as putting it in a purple sand jar.

<>1. Purple sand jar. The purple sand jar can be used to preserve the tea leaves of black tea and black tea, and because the purple sand jar is fired, it needs to be soaked in clean water for a week before use.

2. Metal cans, metal cans are tin cans that can preserve green tea and green tea. Tin cans can hold any type of tea leaves.

3. Clay pots. Clay pots can also be used to preserve black and black tea leaves before serving.

<>1. Purple sand jar. Ziyuchang sand jars can be used to preserve black tea and black tea leaves, because purple sand jars are fired, so they need to be soaked in clean water for a week before use.

2. Metal cans, metal cans are tin cans that can preserve green tea and green tea. Tin cans can hold any type of tea leaves.

3. Clay pots. Yugao clay pots can also be used to preserve black and black tea leaves.

1. Sand can, storing tea is conducive to maintaining the freshness of tea, because it is a porous material, purple sand tea canister is very breathable.

2. Wooden jars, very well sealed, cheap, very well sealed, and relatively poor moisture-proof, are generally good for storing tea in families.

3. The glass jar has good sealing performance, light transmittance, and waterproof and moisture-proof.

4. Ceramic jar, breathable and moisture-proof, environmentally friendly and healthy, suitable for storing some tea leaves that have changed in the later stage.

1. Pay attention to the humidity of tea leaves; Because tea leaves are loose and porous, they easily absorb moisture. When the water content of the tea itself exceeds 5%, the tea leaves can easily spoil. This requires that when storing tea, it is necessary to maintain the dryness of the tea.

It is best to put the tea in a tin cone. The tin cylinder has the characteristics of not being easy to be oxidized, no peculiar smell, and strong sealing. It is the best tea pot for storing tea leaves.

The second is the iron cylinder tea can. Try not to use paper tube tea cans. Because the tea cans of the paper tube are breathable and have poor moisture-proof ability.

2. Pay attention to the temperature of tea preservation; The quality of tea leaves is prone to change in a high temperature environment. The higher the temperature, the faster the quality changes. Experiments have proved that at 0 degrees Celsius, it can inhibit the aging of tea.

It is conducive to the guarantee of quality. For home storage, it is best to keep it in the freezer compartment of the refrigerator.

3. Pay attention to the vacuum of tea preservation; The polyphenols, vitamins, theaflavins, and thearubigins in tea can be oxidized when they encounter oxygen, and these oxidizing substances will make the tea have an old taste and greatly damage the quality of tea. Therefore, when storing tea, it is best to put the tea into a multi-layer composite bag and extract oxygen into vacuum packaging. If it is canned, you should choose the appropriate size tea pot according to the amount of tea, and try to fill as many tea leaves as possible, so that the air content in the tea can is minimized, and it should be sealed after loading.

In this way, the tea can be as non-oxidized as possible.

4. Pay attention to the light-proof nature of the tea leaves; Direct sunlight can change the internal substance of tea, and the more obvious this change is when strong sunlight is directly irradiated. Therefore, white and translucent tea containers should never be placed in direct sunlight. If you want to use colorless transparent glass bottles for tea, be sure to cover the bottle wall with 1-2 layers of clean paper, seal it and put it in a cabinet or cupboard.

If you use cans, tubes, and boxes of tea, do not put them on a table or cabinet top or window sill that has seen light for a long time, so as to prevent light from affecting the quality of tea.

5. Pay attention to the surrounding environment of tea preservation; The container for placing tea leaves must be clean and odorless to prevent the smell of tea from deteriorating. Because tea is particularly easy to provoke flavors, all tea containers must be refreshing and free of other flavors, otherwise the tea will be disturbed by peculiar smells and unbearable to drink. It is not possible to directly wrap tea leaves with mimeographed newspapers, because the ink will soon be adsorbed by the tea leaves and the tea will deteriorate; Do not use plastic bags (or boxes) such as packaged cakes, milk powder, biscuits, and preserved fruits to directly serve tea; Tea, even if it is packaged tea, should not be put in the kitchen, vegetable cabinet, wardrobe and camphor wood box, especially do not mix with soap, mothballs, etc., to prevent serious flavor and deterioration of tea.