Tea fixation/kill-green play a vital role in the tea process, which use the high temperature to destroy and alter the oxidase activity as well as inhibit fresh tea polyphenol. Meanwhile, the fresh tea would lose partial moisture contribute to further rolling and forming. In addition, It improves tea aroma so the tea fixation not only maintain the color but also improve tea quality. The tea fixation process is widely used for green tea, yellow tea, dark tea, oolong tea chrysanthemum, honeysuckle, fresh flowers etc.

There are many ways for tea fixation including hot-air fixation, steam fixation, the pan firing fixation and the combination fixation by the steam-hot air in the green tea processing and the innovative microwave tea fixation technology

The principle of microwave tea fixation is mainly to use the rapid raised temperature to passivate the active oxidase of fresh leaves, inhibit the oxidation of enzymes, and prevent the color change in the subsequent drying process. At the same time, it can remove the grassy smell of fresh leaves and make the tea more intense. Rapid temperature rise can shorten the time of de-activing, avoiding the excessive loss of water in the tea, and thus affecting the later stage and shape.

The main features of microwave tea fixation:

1. Less nutritional loss. The microwave equipment is ready to use and does not require preheating to simultaneously heat the inside and outside of tea leaves. Tea leaves stay in the microwave cavity for a short period of time, only 5%-24% time consumption of hot air drying, so the nutrients in the tea can be preserved to a large extent.

2. Improving quality of tea. The leaf green changes little, the green color is pretty, the density is resistant, and the aroma loss is small.

Since the evaporation rate of water is fast, it is easy to form porosity, and the rehydration of the product is good. The dissolved matter is easily dissolved when the tea is brewed.

3. Sterilization and alcoholization. In the process of picking and making tea, there is often the possibility of secondary pollution. Microwave has the function of sterilization and alcoholization. Microwave can kill eggs, mold and bacteria at lower temperature. The alcoholization function of microwave is irreplaceable by other machinery, especially for summer and autumn tea, which is quite effective in addition to bitterness.

In addition, MAX microwave tea fixation equipment adopts PLC automatic control, the equipment automatically loads and unloads, which greatly saves labor. The whole process only requires 1-2 operators to press buttons, monitor equipment running and patrol fresh leaves. The equipment can continuously work in 24 hours to meet the requirements of mechanization and precision production.

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