The polyphenol oxidase contained in tea is involved in the browning reaction. If we don't fix tea, the polyphenols will undergo oxidative fermentation under the action of enzymes, so the tea leaves will quickly lose their color and then go spoiled. Therefore, the tea leaves need to be inactivated which is tea fixing to keep color bright and fresh tasting.
The microwave heats up very quickly. Making use of the characteristics of microwave rapid heating, the tea leaves are heated up to the temperature that the active oxidase is inactivated in a short time. Generally, microwaves can heat up rapidly to 90℃ for about 3-5 minutes, which temperature of tea green removing needs above 90℃. In this way, the activity of oxidase can be inactivated immediately, so as to fix tea leaves.
The Advantages of Microwave Fixing Tea Machine:
1. Fast heating. Microwaves can directly heat the materials inside and outside simultaneously. No preheating is required and high efficiency.
2. Heating evenly. There are no burn leaves, burn edges, produce debris, etc.
3. Low nutrition ingredients loss. Short heating time, could reserve other nutrients in tea leaves to the greatest extent.
4. The microwave fixing machine also can sterilization and insecticidal eggs.
5. Improving the tea quality. In the processing of fixing tea, fast evaporating water, so it is easy to form porosity, and the dissolved substances are easy to dissolve when brewing tea.
6. Full automation, PLC control, continuous production, saving labor, and reducing operating costs.
7. Environmental friendly. There is no high-temperature environment, dust and noise in the operation.
8. The microwave fixing machine now widely applied: tea, chrysanthemum, honeysuckle, lotus leaf, barley seedling, various flowers, leaves, and so on.
