>From http://todd-holland.com/universitea/brewing.asp

Black Tea
Water Temperature 212 F
Infusion Time 3 to 5 Minutes
No. of Infusions Most Only Once

Green Tea
Water Temperature 185 F
Infusion Time 2 Minutes
No. of Infusions Two or Three

Semi-Black Tea
Water Temperature 185 F
Infusion Time 2 to 7 Minutes
No. of Infusions Three to Ten

White Tea
Water Temperature 175 F to 185 F
Infusion Time 2 to 3 Minutes
No. of Infusions Many


My personal experience with green teas is a lower temperature than
shown above, longer infusion time of 3 minutes and 3 to 4 infusions. I
think each tea is different, and when it comes to multiple infusions,
you probably just have to try it and don't be afraid to throw it out if
it fails to satisfy.