To make Gyokuro, a black cloth cover is put on top of the tea leaves
20 days before the tea plucking, which will suppress the
creation of tannin and hence contains more theanine, which are
the sources of good taste. To enjoy real taste of Gyokuro
you will first put gyokuro into the tea pot, and pour hot water in tea-cup
then pour back the cooled down-warm water into the teapot, and then serve
back into the teacup again.
Taste of tea is best if the color is pure green or pure yellow.