1. The size of the tea leaves: Whole, large tea leaves gain a higher grading
2. The method of production of the tea: There are 2 methods of manufacturing tea. Manufacturing of tea and these are the traditional method of production of tea by hand and the more modern mechanized method which is aptly called the CTC process (Crush, Tear and Curl). It is considered that the mechanized method damages the tea leaves and as a result the tea leaves bear a lower grading.
Dust –D This is the lowest grade in the classification of Black tea. Actually it consists of small pieces of tea leaves and tea dust.Fanning This consists mainly of pieces of tea leaves. It is a low grade.
BOP – Broken Orange Pekoe This consists of small tea leaves or pieces of large Leaves.It is considered a medium grading for the classification of tea leaves.
OP - Orange Pekoe This consists of large, whole tea leaves picked without the flower bud of the tea plant.
FOP – Flowery Orange Pekoe These are the whole tea leaves together with the flowering tea plant.
In addition to the five main categories of tea there are two further important qualities or traits and these are Golden where gold hues occur in the tea leaves evidencing their quality and Tippy which signifies an abundance of young tea buds.The following classifications relate to choice tea consisting of whole leaves and complemented by one of the above traits:
GFOP Golden Flowery Orange Pekoe These are whole, young tea leaves whose tips are golden and are complemented by the flowers of the tea plant.
TGFOP Tippy Golden Flowery Orange Pekoe This consists of the tea bud and two uppermost leaves of the tea plant complemented by the flowers of the tea plant. This is the highest category in the grading of tea. However in this highest grading of tea leaves there are also two further quality refinements marking the best of the best:
FTGFOP Fine Tippy Golden Flowery Orange Pekoe for choice tea leaves
SFTGFOP Super Fine Tippy Golden Flowery Orange Pekoe which is the highest existing grade for tea leaves.
ref:http://www.wtea.com/about-tea_grading.aspx
