At a time when the consumption trend of healthy drinks is booming, the limitations of traditional tea processing technology are becoming increasingly prominent. The special experiment of Yashixiang cold-brewed tea carried out in March 2025, with the innovative HPP low-temperature ultra-high pressure technology as the core, successfully overcame the dual difficulties of tea in the extraction and sterilization links, and brought a new solution for the industry that combines nutrient retention and long-term preservation.
Three real dilemmas of traditional tea processing
Traditional tea production has long relied on high-temperature extraction and thermal sterilization processes, but inadvertently caused multiple damages to the quality of beverages:
● Loss of active ingredients: Heat-sensitive substances such as tea polyphenols and vitamin C are oxidized and degraded due to high temperature, resulting in a significant decrease in the antioxidant capacity of beverages;
● Volatilization of flavor substances: Under high temperature conditions, a large amount of volatile aroma components in tea leaves are lost, and tea soup is prone to produce a "cooked soup taste", which greatly reduces the taste and flavor level;
● Limited sterilization effect: Thermal sterilization has limited inactivation effect on some heat-resistant Bacillus, and there is a potential safety risk of excessive microorganisms.
Consumers' strong demand for natural and healthy drinks and the inherent defects of traditional processes have formed an industry contradiction that needs to be broken through. In this context, the application value of non-thermal processing technology HPP has gradually become prominent.
HPP technology: a dual-effect innovative solution for cold extraction and sterilization
Technical characteristics and mechanism of action
HPP (High Pressure Processing) technology achieves dual functional breakthroughs at room temperature or low temperature by applying a hydrostatic pressure of 100-600 MPa:
● Efficient cold extraction enhancement: The high-pressure environment can destroy the cell wall structure of tea leaves, significantly improve the penetration efficiency of water molecules into the cell interior, and promote the rapid dissolution of effective ingredients such as tea polyphenols, amino acids, and aroma substances. Compared with traditional high-temperature extraction, this process can achieve improved extraction efficiency without heating, and retain the natural properties of active ingredients to the greatest extent;
● Precise sterilization protection: High pressure can destroy the cell membrane structure of microorganisms and inhibit enzyme activity, and can effectively inactivate common microorganisms such as total colony count, coliform group, mold, yeast, and pathogenic bacteria such as Salmonella and Staphylococcus aureus. Especially for heat-resistant bacteria that are difficult to treat by thermal sterilization, HPP technology shows significant advantages.
Innovative Practice of Duck Shit Fragrance Cold Brew Tea Process
1. Full-process process optimization
Raw material pretreatment: Place the Duck Shit Fragrance tea leaves on a mesh screen and rinse them with pure water to thoroughly remove surface impurities; then divide the washed tea leaves into bottles, inject pure water in proportion and seal them;
● Cold extraction: Use 400 MPa pressure and 2 minutes for a single treatment, and extract twice in a row. Under high pressure, water molecules quickly penetrate into the tea cells, causing the effective ingredients to be fully released, forming a tea soup rich in tea polyphenols and natural aroma;
Filtration and sterilization: Use a mesh screen to filter the tea soup and separate the tea residue; after the filtrate is re-bottled and sealed, it is sterilized at 500 MPa pressure for 10 minutes to complete the inactivation of microorganisms in a low temperature environment;
● Storage performance: Duck Shit Fragrance cold brew tea treated with HPP technology can be stably stored for more than 1 month at room temperature without adding any preservatives.
2. Supported by authoritative testing data
The test report (No.: A2250306585101001C) issued by Dongguan Huace Testing and Certification Co., Ltd. shows that tea soup treated with HPP technology performs well in microbial indicators:
● Microbial indicators such as total colony count, coliform group, mold, yeast, etc. are all below the detection limit (<1 CFU/mL), reaching the "undetectable" level;
● Pathogenic bacteria such as Salmonella and Staphylococcus aureus did not appear at all in the test, meeting the highest food safety standards.
In addition, sensory and ingredient analysis shows that HPP cold-brewed tea soup has a bright color and rich aroma, and the content of tea polyphenols is more than 30% higher than that of traditional processes, fully demonstrating the significant advantages of this technology in retaining natural flavors and nutrients.
Industry application value and market potential of HPP technology
1. Path to enhance brand competitiveness
● Quality upgrade breakthrough: Through low temperature and high pressure technology, the active ingredients and natural aroma in tea are retained to the maximum extent, making the tea soup present a fresher taste and richer flavor levels, setting a new benchmark for product quality;
● Safety and freshness advantage: The non-thermal sterilization process achieves efficient microbial inactivation while avoiding the damage of high temperature to nutrients, giving the product a shelf life of more than 1 month, meeting the needs of industrial production and circulation;
● Differentiated marketing highlights: In line with the current "clean label" consumption trend, product positioning can be carried out around core selling points such as "no additives, natural cold extraction, high pressure sterilization", enhancing consumer awareness and brand recognition.
2. Expansion of diversified consumption scenarios
● Ready-to-drink tea market: suitable for refrigerated drinking, can be widely used in instant consumption scenarios such as sports, office, leisure, etc., to meet consumers' demand for convenient and healthy drinks;
● Customized high-end tea drinks: provide pre-packaged cold-brewed tea bases for boutique teahouses and coffee shops, support creative beverage development, and expand high-end product lines;
● Functional beverage field: strengthen the promotion of the health effects of tea polyphenols, amino acids and other ingredients, attract consumers who pay attention to health preservation, and promote tea drinks to extend to the field of functional drinks.
Future outlook of the industry: HPP technology drives innovation in the tea beverage industry
This experiment fully verified the feasibility and advancement of HPP technology in tea beverage processing. Its "cold extraction + sterilization" integrated solution not only solves the inherent problems of traditional thermal processing technology, but also provides a new idea for the industrial production of natural beverages in a technologically empowered way. As consumers' demand for "zero-additive, high-activity" beverages continues to grow, HPP technology is expected to become the core technology standard of the future tea industry, leading the industry to accelerate towards "more complete nutrition retention, longer-lasting freshness preservation, and more sustainable production methods".
When traditional tea culture meets modern high-pressure technology, HPP technology is redefining the standard of a cup of good tea with its innovative power - while retaining the natural flavor, it brings consumers a safer and more lively drinking experience. This technological breakthrough is not only a quality revolution for Yashixiang cold-brewed tea, but also indicates that the entire tea industry is about to usher in a far-reaching technological innovation.