Scientific research shows that drinking water contains minerals and trace harmful heavy metal ions, such as cadmium, mercury and arsenic. When water is heated, the solubility of some calcium and magnesium ions decreases and the concentration of insoluble salts increases with the increase of water temperature. When water is concentrated to a certain extent, it will precipitate out.
These precipitates can be brewed with water and enter the cup. If the tea leaves are not drunk for a long time or left exposed to the air, the tea polyphenols in the tea leaves and the metal elements in the tea rust will be oxidized, resulting in tea rust, commonly known as tea scale, which adheres to the inner wall of the cup. Tea rust contains cadmium, lead, mercury, arsenic and other harmful metals, which is the chief culprit endangering human health.
Wash off the tea stains thoroughly.
The thicker the tea scale, the harder it is to clean, so daily cleaning is as important as regular cleaning. Experts suggest that after drinking tea every time, even if there is no obvious tea stain on it, the tea set should be carefully cleaned to avoid many a mickle makes a mickle.
1, tea scale is not easy to clean up after a long time. Soak in heated rice vinegar or baking soda for a day and a night, and then brush with a toothbrush, which is easy to clean. It should be noted that if you use a teapot, you don't need to clean it like this. The teapot itself has pores, and the minerals in the tea scale can be absorbed by these pores, which can not only maintain the teapot, but also prevent harmful substances from "running" into the tea and being absorbed by the human body.
2. Put a teaspoon of orange powder or orange juice in the teacup and teapot, fill it with clear water and let it stand for 2-3 hours, so that the tea scale loses its adhesion with the tea set and can be easily removed.
3. Add water to the teapot or teacup, add potato skin, heat it to boiling, cool it and rinse it, then you can easily clean it.
4. When the metal tea partition is used, it will turn black due to tea dirt. If it can't be washed off with a medium-sized cleaner, it can be soaked in vinegar or easily cleaned with bleach.
5. Coat it with edible salt, especially where there is tea dirt. Then scrub the teacup with a toothbrush, and finally rinse it with clean water.
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