Abstract: This invention is related to a method of manufacturing a tea drink, which comprises the steps of subjecting tea leaves to extraction to obtain an tea extract and adjusting the pH of the tea extract to the range of 5.0-6.0, mixing nitrogen into the tea extract while applying a negative pressure of 0.01 MPa or more, stabilizing the tea extract in succession to the step of applying a negative pressure by maintaining the tea extract under a pressure of not higher than atmospheric pressure for a period of 30 seconds to 20 minutes, and adjusting the pH of the tea extract to the range of 5.5-6.5 during or subsequent to the step of stabilizing the tea extract.

Abstract: To provide a new manufacturing method of containered green tea beverage suited for selling hot. A step of eliminating silica was introduced in the manufacturing process, wherein the silica is eliminated after adding silica to a tea extract obtained by extracting green tea leaves to adsorb the sediment component present in tea extract to the silica. By adding silica to the tea extract and bringing them into contact, the proteins and polysaccharides causing secondary sediment can be selectively adsorbed and decreased, allowing the occurrence of sediment to be prevented, even when selling the beverage hot. Furthermore, it allows a large amount of flavor component to be left. Further more, a large amount of catechins can be left in the beverage, allowing the growth of heat-resistant bacteria to be inhibited by the antibacterial action of catechins.

Abstract: This invention is related to a method of manufacturing a tea drink, which comprises the steps of subjecting tea leaves to extraction to obtain an tea extract and adjusting the pH of the tea extract to the range of 5.0-6.0, mixing nitrogen into the tea extract while applying a negative pressure of 0.01 MPa or more, stabilizing the tea extract in succession to the step of applying a negative pressure by maintaining the tea extract under a pressure of not higher than atmospheric pressure for a period of 30 seconds to 20 minutes, and adjusting the pH of the tea extract to the range of 5.5-6.5 during or subsequent to the step of stabilizing the tea extract.

Abstract: To provide a new manufacturing method of containered green tea beverage suited for selling hot. A step of eliminating silica was introduced in the manufacturing process, wherein the silica is eliminated after adding silica to a tea extract obtained by extracting green tea leaves to adsorb the sediment component present in tea extract to the silica. By adding silica to the tea extract and bringing them into contact, the proteins and polysaccharides causing secondary sediment can be selectively adsorbed and decreased, allowing the occurrence of sediment to be prevented, even when selling the beverage hot. Furthermore, it allows a large amount of flavor component to be left. Further more, a large amount of catechins can be left in the beverage, allowing the growth of heat-resistant bacteria to be inhibited by the antibacterial action of catechins.