Main Pigment Substances in Pu'er Tea
The main pigment substances in Pu'er tea are theaflavin, thearubigin, and theabrownin, which are considered the primary water-soluble oxidation products of tea polyphenols. Theaflavin is the main component responsible for the brightness of the tea liquor; thearubigin gives the tea liquor its red col...
Tea News · May 08, 2026
How does black tea become cloudy after cooling? Does it affect tea quality?
When black tea cools, it often becomes cloudy, a phenomenon known as 'cold after turbidity' or 'tea cream.' This occurs because theaflavins, formed during fermentation, are soluble in hot water but aggregate as the temperature drops. Contrary to common belief, this turbidity is not a sign of poor qu...
Tea News · Jan 19, 2026
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