There is no such thing. A nice cup of tea. But this kappa can easily be destroyed by a layer of film that can form on top if the wine stays for more than a minute or two.
Scientists at the Institute of Food, Nutrition and Health in Zurich have discovered why tea is prone to contamination, and there is good news: it is preventable.
“Anyone can make a cup of tea from just water and tea leaves, but this film can be made by chance in the eyes of an everyday tea drinker,” the researchers wrote in the journal. Fluid physics.
“However, in the lab setting, the film can be carefully controlled.
They got film shapes when compounds in tea leaves, called polyphenols, bind to calcium carbonate in tap water.
The higher the amount of minerals such as calcium and magnesium in the water, the more likely and thicker the layer of dirt.
So the first thing you can do, especially if you live in a hard water area, is to use soft or filtered water to make your tea.
However, experts advise not to use highly pure, deionized water.
“If you make a cup of tea in pure water, it will not make a film at all, but the tea will taste very bitter,” he wrote.
Citrus is a diluting agent, so adding some lemon juice will help remove dirt. If you are frustrated, you can also visit Earl Gray, as bergamot is naturally acidic.
Sweet-toothed people will be happy to know that sugar does not dilute the film, but it does not make it worse.
But even the smallest amount of milk produces a thicker layer of dirt than black tea (of course it is full of calcium).
If, however, black is not your cup of tea and you do not like to shell out for a filter, you can be sure that the film, while ugly, has a completely tasteless and harmless chemical reaction.
Scientists have another tip for those who want a clear Kappa: The colder the film, the more visible it will be, so drink it in the heat.
It is also: “To see the phenomena without hard water, one may neglect to wash a cup of tea and combine the neglected minerals in a few uses.”
But it just goes down like a cup of cold tea.