Nov 4th, '07, 20:40
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Thermos Changing My Tea?

by Theo Sinensis » Nov 4th, '07, 20:40

I just recently started pouring the liquor of my teas into a Thermos to keep them hot over a few hours. But I've noticed something interesting that has me puzzled. Over time, the colour of the tea changes, and with a very fine single estate Darjeeling, the wonderful flavour I have at the beginning is almost absent after an hour in the Thermos.

Two questions come to mind for me as a new connoisseur of fine teas:

(1) Is the prolonged heat over time in the Thermos actually changing the flavour and character of my tea?

(2) Has anyone else experienced an 'anti-climactic' taste in first flush Darjeelings, where after you've had that first wonderfully aromatic and flavourful cup, it just doesn't hit you the same way on the second and third cup of the same brew? Is the astringency of the Darjeeling dulling my taste buds? (For example, I can get a consistent taste in the whole brew from Adagio's Citron Green, but I find myself swishing around inside my mouth to get that same taste one gets from the first sip of Darjeeling.)

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Nov 4th, '07, 23:38
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by Mary R » Nov 4th, '07, 23:38

It might. But I've noticed significant darkening and flavor change in any tea that is left out. Very pale whites can turn as black as a CTC Assam when left exposed to air for a day. Oxidation continues after brewing, but it's slowed down a good bit when the tea is chilled.

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Nov 5th, '07, 01:01
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by Wesli » Nov 5th, '07, 01:01

Steel thermoses fail when it comes to tea. Give me a thick double-walled glass thermos.

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Nov 5th, '07, 09:07
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by Chip » Nov 5th, '07, 09:07

Air is an enemy of brewed tea, even in a thermos. Air or oxygen will cause discoloration and "turn" the flavor of brewed tea.

One guy told me he would fill his thermos to the very top eliminating all the air. When he would open it the first time, his tea would be very fresh and still have much of the original color and flavor. Subsequent openings were more and more discolored and had lost more and more flavor.

Hmmm, I got a can of nitro gas from a liquor store. I wonder if flushing the air out with nitrogen would help...works for wine?

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Nov 5th, '07, 11:07
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by Wesli » Nov 5th, '07, 11:07

Give me a double-walled, nitro-flushing, vacuum-sealing glass thermos. :lol:

But the oxidation could come from the sublimated oxygen in the water...

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Nov 5th, '07, 21:40
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by Chip » Nov 5th, '07, 21:40

What the heck...thermos and tea are bold in everyone's post in this thread. Has Mary been tinkering again with the forum settings? Or is this part of the new upgrade.

*thinking out loud*

Hmmm, and now it is not..."captain, the forum is becoming a sanctioned learning being with a life all its own...."

wow...search words are bold...I never knew that. I had searched thermos tea...pretty cool.

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Nov 5th, '07, 22:21
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by Wesli » Nov 5th, '07, 22:21

:D Near mental breakdown alert!

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Nov 5th, '07, 22:21
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by Mary R » Nov 5th, '07, 22:21

Glad to see you solved your own problem there, chip

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Nov 5th, '07, 22:29
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by Chip » Nov 5th, '07, 22:29

...that is one of my problems down...
blah blah blah SENCHA blah blah blah!!!

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Nov 7th, '07, 01:45
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by skywarrior » Nov 7th, '07, 01:45

I've noticed that tea changes in both color and taste in a thermos. Not pleasantly, I might add. :(

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Nov 7th, '07, 02:39
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by Wesli » Nov 7th, '07, 02:39

Zojirushi makes some vacuum sealers you could take a look at.

HERE

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