The production process of green tea is divided into three steps of greening, kneading and drying:
1, greening
Take high temperature measures, so that the contents of the fresh leaves are rapidly transformed, destroying the organization of the fresh leaves, and thus destroying the activation of enzymes, and then the contents of the substance in the role of non-enzymatic reflection, the formation of the green tea color, aroma and taste of the quality characteristics. So the most important purpose of killing is the external cause through the internal cause of the initial change in the shape of fresh leaves.
2, kneading
The kneading can be understood as two actions, a kneading, kneading even if the tea into a strip, a twist, twisting the tea cells can be broken, extrusion of tea juice, so that the tea juice attached to the surface of the tea strip to increase the viscosity, is conducive to the formation of the shape of the tea leaves, both the way to make the tea leaves to reduce the area of the rolled into a strip. Easy to brew, to improve the concentration of tea flavor also has an important role.
3, drying
The purpose of drying is to use high temperature to destroy the enzyme, to stop enzymatic oxidation; the second is to evaporate water, tighten the tea, so that the tea is fully dry, to prevent non-enzymatic oxidation, conducive to maintaining the quality; the third is to disseminate the green odor, to further improve and play the aroma. Drying process, the role of thermochemical dominant.
Expanded Information:
Value Effects
1, anti-aging. Helps to delay aging, tea polyphenols have a strong antioxidant and physiological activity , is the body's free radical scavenger. Research has proved that 1 mg of tea polyphenol scavenging harmful excess free radicals in the human body is equivalent to the efficacy of 9 micrograms of superoxide dismutase, much higher than other similar substances.
2, inhibit disease. Helps inhibit cardiovascular disease tea polyphenols have an important role in human fat metabolism.
3, anti-cancer. Tea polyphenols can block ammonium nitrite and other carcinogens synthesized in the body, and has the effect of directly killing cancer cells and improve the body's immune system.
4, anti-virus bacteria. Tea polyphenol has a strong astringent effect on pathogenic bacteria, viruses have obvious inhibition and killing effect, anti-inflammatory and antidiarrheal effect. China has a number of medical units apply tea preparations for the treatment of acute and chronic dysentery, amoebic dysentery, influenza, the cure rate of about 90%.
5, beauty care. Tea polyphenol is a water-soluble substances, with which the face can clear the face of grease, astringent pores, with disinfection, sterilization, anti-aging skin, reduce ultraviolet radiation in the sun on the skin damage and other effects.
6, brain refreshment. Tea caffeine can prompt the body's central nervous system excitation, enhance the cerebral cortex of the excitation process, and play a refreshing benefit of thought, the effect of clear mind. For the relief of migraine also has a certain effect.
Baidu Encyclopedia - Green Tea