A Story About Tea (Camellia sinensis)

Tea Leaves (Source: http://ar.wiki2000.com/)

Tea leaves are used to make black tea and green tea. The differences between the two types of tea are caused by different processing methods. The quality of tea is determined by the type of leaf picked. Buds or pekoe and young leaves will give better tea quality than old leaves. The bird leaves are the last bud before dormant bud (the state of stopped growing). 

The picking system P+1 means that the picked buds are composed of pekoe bud and one young leaf respectively (the bottom part) and P+2 means that the pekoe and two young leaves.

The freshly picked tea leaves contain water about 75-82% and the organic matter such as tannin, caffeine, pectin, protein, starch, aromatic/essential oil and vitamin. This below table will show the composition of organic and inorganic matter :

Matter	% Dry Matter
Cellulose and hard fiber Protein Chlorophyll & Pigments Tannin Starch Caffeine Amino Acid Sugar Ash	34 17 1.5 25 0.5 4 8 3 5.5

Many tannin substances are widely found on tea buds that play an important role in determining color, taste, and aroma tea. The caffeine substances are also important in generating a sense of pleasure in hot tea water.