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Why does my green tea turn brown after a few hours? [View All]

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Rabrrrrrr Donating Member (1000+ posts) Send PM | Profile | Ignore Mon Jun-26-06 04:21 PM
Original message
Why does my green tea turn brown after a few hours?
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Edited on Mon Jun-26-06 04:22 PM by Rabrrrrrr
I often make a pot of green tea and put it in a thermos that I use only for green teas.

I've noticed that after a few hours, the tea that went into the Thermos a nice green color turns brownish. The taste doesn't change, but the color does. Is this a normal function of green tea, that it will slowly turn brown? Or is it being stained somehow by the thermos? Or maybe being starved of oxygen? Or some other process?

Do you know the answer to this question?

And when I say green tea, I'm talking Japanese green tea, which is pretty fucking green, and some pretty high quality green tea at that.
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