Why is my Green Tea Brown but then Green when I reuse the bag?
I know that with pu'er tea (not a green tea), they rinse and 'awaken' the tea with the hot water first - dumping out the first brew (seemed like a waste to me).  They say the 2nd is good, but the 3rd cup and on is much better !  I never noticed the color of my green tea changing, but I must admit i like the second pot better than the first - when re-brewing same tea leaves.  perhaps the oxidation from the leaves is brewed of in the first pot?