Re: Chemically removing tea stains from china
From: Muhammar (muhammar_at_hotmail.com)
Date: 11/23/04
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Date: 23 Nov 2004 15:11:59 -0800
Tea deposits are oxidized tanin salts. They are polyphenolic and
dissolve in alkalic solutions. Try a diluted (1-5%) aqueous solution
of sodium hydroxide (lye). It works like a charm.
Since calcium and magnesium in water are the culprits of the tea
tannin precipitation and since they also spoil the flavor of tea, try
to make tea from de-ionised water. (The tea always tastes better in
the mountains because water there is soft.)
"Maarten D. de Jong" <this.address@is.invalid> wrote in message news:<cnvss8$755$1@news.tudelft.nl>...
> My girlfriend has a beautiful china tea pot which is proving very diffi-
> cult to physically clean on the inside. As a result, there is an increasing
> amount of tea stains building up there. Is there a way to remove these with
> chemical means? Even a partial removal would be an improvement at this stage.
>
>
> With kind regards,
> Maarten
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