The fragrance of tea depends on the essential oils and tar substances that are contained in plants. Essential oils are complex mixture of substances that belong to the most diverse class of compounds which are soluble in organic solvents and possessing the ability to escape from water vapor. Overall the total content of essential oil is minimal; it is determined by only hundredths of a percent. For example, aromatic black tea contains about 0.02% of oil. Pure essential oil of fresh tea leaf is a green color with a strong fragrance of fresh greens. In the technological processing of tea leaf occurs the formation of a new aromatic substances that contribute to the specific flavor of the finished product. Thus, the composition of essential oil of green plants is different from the finished black tea. The substances that make up the oils can be divided into 4 main classes of compounds: acids, carbonyl compounds, alcohols and phenols. These volatile compounds found in tea are trace amounts - 0.01% of dry matter, but their role in the establishment of the tea flavor is tremendous.
Some parts of the plant contain different amounts of volatile compounds, which, in turn, differ in their compositions. The maximum concentration of essential oil found in the tender stems and leaves. The top leaf with the growing bud and two next leaves are equivalent to the content of essential oil. Further down the stem, as general coarsening occurs, oil content decreases. Which explains why the top three leaves are the most vaulable for high quality tea.
In the formation of the aroma of tea, the main role is played by aromatic aldehydes (Organic compound that has OH-group in its structure. They are used in organic synthesis as fragrances). In the composition of essential tea oils are vanilla, lavender, cinnamon aldehydes, etc. During the processing of tea leaves into black tea, the various fractions of volatile compounds undergo significant changes. The total content of these compounds increases most radically in the early stages of rolling. In the process of withering the relative content of components with higher boiling point reduces and low-boiling point, on the contrary, increases.
Along with essential oils important role in creating a tea aroma played by various resinous substances - carriers of flavor. They are in a close chemical relation with essential oils and are a complex mixture of different classes of organic compounds.
The content of tarry substances in tea leaves ranges on average from 3% to 6%. These substances are separated by several fractions, the most valuable of which is a neutral faction. It has a pleasant sweet floral aroma. In the process of technological treatment , the amount of this fraction in tea leaves increases by 40%.
During the processing of tea leaves, the content of resinous substances decreases, indicating the result of oxidation. I.e. ratio: fresh leaves – 3.48%, withered leaves – 3.27%, after two hours of curling – 2.92%, semi-finished product – 2.35%.
Through fragrance of tea, all the deficiencies that have arisen as a result of violations of technological regimens or improper storage of products, can easily be found. Disadvantages may include: acidity, mustiness, smell of the green, smoke and other uncharacteristic for tea scents. Most difficult to improve defect is acidity, which results in a violation of the fermentation process. Since in the processing of tea leaves, especially during the fermentation, occurs a reduction of Tannin. Therefore, the tea produced in violation of this process turns out with a bitter flavor and pale color of infusion. The cause of the smell of greenery is an infringement of withering, rolling, and fermentation. Such a tea has a mild flavor that the brew is a greenish color in the cup with a greenish ring on the surface and instead of the characteristic astringent taste; this product has a bitter taste. If there is excessive moisture in semi-finished product (more than 7.5%) tea is aging much faster. For extended storage. it gets the smell of dampness and can come in unsuitable conditions for consumption.
In addition, it is worth noting that different varieties of tea, as well as different ways of brewing, have an imprint on the final quality of the drink
According to “urban legend”, iced tea was discovered accidentally by an enterprising Englishman Richard Blechynden who had come all the way from Calcutta, India to represent teas from the Far East at the 1904 St. Louis World’s Fair. Not meeting with much success in the stifling heat, Mr. Blechynden poured the tea over ice and met with a near instant success. However, the oldest printed recipes for iced tea were published in 1870. Russian tea with sugar and lemon slices was fashionable in the USA and served in hotels in 1860th under the name “tea a la Russe” both hot and cold.
America is unique in its tea consumption habits. In the United States over 85% of the tea is consumed as an iced beverage. Iced tea has gained wide spread popularity as an alternative to carbonated soft drinks being an attribute of a healthy life style. This refreshing drink is traditionally served sweetened or unsweetened with lemon slice over ice cubes in a tall glass. Black tea is the classic ingredient used to make iced tea. With incredible offers on the market today for black and green teas, Rooibos, blended teas, ayurvedic, flavored, herbal and fruit teas, try to find your preferred beverage by experimenting with such a variety. For iced tea to have consistent strengths from start to finish, use ice cubes made from leftover tea.
Here are three ways for making perfect iced tea:
Hot Water Method
Boil water. Steep your favorite tea with double the amount of loose leaf. Strain prepared drink to remove the tea leaves. Sweeten with sugar or honey if desired. Pour the strained tea into a pitcher with ice cubes. Serve in a tall glasses filed with additional ice cubes, garnish with a lemon slice and a spring of fresh mint.
Cold Water Method
This method is the best to achieve a crystal clear drink result. Fill a large pitcher with cold water and loose leaf tea (8 teaspoons of tea per 4 cups of water), let it chill overnight. Strain the mixture to remove tea leaves. Sweeten with sugar syrup if desired. Serve and enjoy.
Sugar syrup: combine equal amounts of water and sugar in a small saucepan. Bring to boil and simmer until clear, about 7 minutes. Cool and store in refrigerator. You may add lemon zest to the mixture while boiling, proceed as directed, discard the zest and enjoy lemon sugar syrup with your favorite iced tea!
“Sun tea” is tea brewed by being left to steep in the sunlight. In a glass jar, combine water and loose leaf tea (8 teaspoons of tea per 4 cups of water). Place the jar in a warm, sunny location for 3-4 hours. Strain the mixture to remove tea leaves. Sweeten with sugar syrup if desired. Chill in refrigerator. Serve and enjoy!
There are also lots of different variations of iced tea. Common modifications to the traditional recipe include adding fresh fruit, flavored syrups, cranberry or orange juice, sparkling water and even champagne to make a delicious tea drink. Bubble tea is very popular in Taiwan and worth to try on a hot summer day as an exotic desert. A strong black tea sweetened with condensed milk and served cold with large tapioca pearls. Great low calorie desert that quenches your thirst! The possibilities for making a unique and refreshing glass of iced tea are virtually countless. Experiment and enjoy your summer!