The tea production process is considered an art. Because of the close control of production And with the meticulousness of every production step, it will result in a variety of teas with different flavors. Whether it is drying the tea leaves, or withering, through rolling and fermentation or oxide reaction, every step is important to the taste of the tea. The production of good tea leaves must also be planted in good quality. Because the important part comes from the natural environment, both the terrain and the climate. And there are many things that are worth knowing about growing green tea (Read more at https://bit.ly/3eRNXRU ). In Japan itself, there are only a few places that can grow green tea with good yields. The well-known area is Uji City, Kyoto, where farmers have experience in both planting and harvesting techniques.
The tea leaf harvesting process begins in early May, when the young leaves are carefully selected from the tea plant, with the best young leaves being called “ichibancha (一番茶).” Experts select only the youngest and greenest leaves to be namacha (生茶), or “fresh tea.” The leaves then go through the main production steps, as follows:
- Withering: This process is done by shaking off moisture from fresh tea leaves at room temperature for 8-24 hours (depending on the type of tea to be produced). The leaves are then dried to reduce the water content of the tea leaves by 50-60%. The resulting tea leaves are soft and bendable before being processed further.

- Rolling: By rolling the leaves to dry them by twisting and crumbling them. During rolling, some broken leaves are normal. If there is no machine, some people may shake or use their hands. During the rolling process, oil will come out of the tea leaves, giving the tea a special aroma. The chemical changes that occur for a short period of time through rolling will result in tea leaves with good taste and aroma. After that, they will be sent to a sifter to separate the types of tea. Small leaves will go to the next step, while bigger and harder leaves will be sent back to be rolled a second time.

- Oxidation/Fermentation is a chemical process in which oxygen is absorbed to release enzymes that react with air. It begins when the leaf membranes break down during oxidation, causing the leaves to turn a bright gold color. This is the key factor in determining whether a tea is green, black or oolong. It is a transitional stage that affects the aroma and color. If this stage is stopped too soon, the tea will be green and may have a metallic taste. If fermented for too long, it will gradually become sweet and lose both its quality and aroma.
- Drying or burning: This process will dry the leaves evenly throughout the leaves by applying continuous heat of about 120-200 degrees Fahrenheit to stop the oxidation fermentation process. There are two ways to stop the oxidation fermentation process: steaming using heat or by roasting. The tea leaves are placed in a large iron basin for about 20-30 seconds and heated to 100 degrees Celsius. This stops the destruction of the enzymes that cause fermentation. The tea leaves remain green. Roasting causes the tea leaves to turn black and dry, leaving only 2-3% moisture. However, excessive heat can cause the tea to lose its flavor, color, and aroma.
- Grading is a process in which leaves are graded using a screening device or sieve with different sized burrs.
The above steps do not mean that all types of tea must go through this process, but it is just an overview of the tea leaf processing process. The production of each type of tea will have slight differences, resulting in different flavors. For example, the production of white tea has the shortest steps because it does not have to go through the rolling process and the fermentation process or the oxidation reaction. The young tea leaves will be picked and dried before entering the drying process using steam immediately. Because white tea does not have a fermentation process, the color of the tea leaves is still green and white. In terms of the production of black tea , it is the tea that goes through the most processing steps. The collected tea leaves will go through the full fermentation process, consisting of the 5 basic steps above. During the drying period, the leaves will be 80% dry, which is black tea. But if it is dried too much, it may not have a fragrant smell. The method of making oolong tea is similar to black tea, but the difference is that the leaves are dried directly in the sun for 6 hours. Then, the leaves are shaken in a bamboo basket to make the edges of the leaves flawed, while the center is still green. The fermentation time is about half that of black tea. The oxidation reaction is stopped by making a fire. For oolong tea, the leaves are heated at a higher temperature because they contain a lower water content.
Green tea starts with the first drying of the tea leaves. After that, they are placed on a pan or steamed to prevent the oxide reaction. Finally, the leaves are rolled and dried quickly for the last time. This method keeps the tea leaves green. Due to the simple and less steps in the production process, green tea still has more beneficial plant substances than other types of tea. Green tea can also be divided into 2 types: steamed green tea and roasted green tea.
1.1 Steamed green tea is the process of stopping the chemical processes in the tea leaves by steaming them for a short period of time. When picking the tea leaves, they must be steamed at a temperature of 100 degrees Celsius for 0.7 minutes to stop the activity of the enzyme polyphenol oxidase. Then, they are massaged with hot steam to reduce the moisture content in the leaves. Then, they are massaged in a room at normal temperature to break the cells and massaged with heat again to make the tea leaves roll up beautifully. Then, they are dried to reduce the moisture content in the tea leaves to 4%. Most steamed green tea is processed in Japan. The color of this type of tea is green to yellowish green because it still contains chlorophyll.
1.2 Roasted green tea is tea that stops the chemical processes in the tea buds by roasting them in a hot pan at a high temperature of about 300-350 degrees Celsius, then kneading to break the cells until they roll up and dry. Roasted green tea can be separated into 2 types: lightly fermented roasted green tea and unfermented green tea. The color of the tea is light green with a yellow tint.
From the various steps of tea production process above, it can be easily summarized in this diagram.
I believe that tea lovers, after reading this article, many of you will definitely start to be interested in visiting tea plantations in Japan ^^
Source
http://www.refresherthai.com/article/teaMade.php
http://www.ocha.tv/how_tea_is_made/process/schedule_ryokucha/
Article from : Fuwafuwa









































