[1] Due to climatic conditions, topography, manufacturing process, and different cultivars of the Camellia sinensis plant (tea), the final product may have vastly differing flavours and appearance.
A trained tester can detect these differences and ascertain the tea's quality prior to sale or possible blending.
[2] The ISO 3103 standard describes a standardised method for brewing teas to make meaningful sensory comparisons.
A tea taster uses a large spoon and noisily slurps the liquid into his/her mouth.
A 'cupping set' is used for tasting tea and is always white in colour to allow examination of both liquid and the leaf.