When making tea, after using the teapot and tea cup for a period of time, there will often be a layer of brown and red tea rust that is not easy to wash off. What is tea rust? Where did it come from? How to remove tea stains from tea cups? How to remove tea rust?
1. Milk removal method
First clean with detergent, then pour two soups of fresh milk into the plastic cup, cover the lid, shake it, so that every corner of the cup comes into contact with the milk, for about one minute, and finally pour out the milk and clean the cup.
2. Orange peels remove the flavor method
First clean with detergent, then put the fresh orange peels in it, cover it, and place it for about 3 to 4 hours to clean it.
3. Using toothpaste to remove tea rust
It is not difficult to remove tea rust. You just pour out the water from the teapot tea cup, squeeze a piece of toothpaste with an old toothbrush, and brush it back and forth in the teapot and tea cup. Because the toothpaste contains both detergent and extremely fine friction agent, it is easy to wipe the tea rust without damaging the cup. After rinsing it, rinse it with clean water, and the teapot and tea cup will become bright and new again.
4. Replace the plastic cup
If none of the above methods can remove the odor of the plastic cup, and rinsing the hot water will cause the cup to emit a strong and irritating smell, consider not to drink water with this cup. The plastic material of the cup may be poor, and drinking water with it may be harmful to health. It is safer to give up on it and change to a cup.
Related reading: Why tea rust occurs
When you put the tea leaves in the teapot, rinse it in Buddha's boiled water, wait for a while, and a pot of fragrant and delicious tea will be brewed. Maybe you didn’t expect that there were dozens of chemical components that gradually dissolved from tea into water! For example: the ingredient that makes tea astringent taste is tannins, and the volatile oils that make tea produce a special aroma; caffeine and theophylline that will have excitatory and diuretic effects after drinking tea; green tea appears green, which is because of chlorophyll, and black tea appears red, which is caused by theophyllin and other pigments; in addition, tea also contains several vitamins, sugars, and a variety of inorganic salts. The main trick of tannin is to cause tea rust to appear in teapots and tea cups. Tannins are complex phenolic organic substances that are soluble in water, especially boiling water. When you eat persimmons that are not too ripe, your tongue will often become numb, and this is the tannin that is teasing you. Immature fruits, water chestnut, lotus root and many Chinese herbal medicines contain tannins. However, tannins of different sources do not have the same chemical structure and taste. The taste of tea tannin is astringent and then sweet, and many people especially appreciate this taste! Tannin is a guy with a not very stable personality. When it meets the oxygen in the air, it will enthusiastically make friends with oxygen, pull the oxygen atoms into its body, and make itself oxidize and turn it into a dark color. Therefore, the color will always darken after the tea is placed. In addition, chemical changes such as condensation and dehydration will occur between tannin molecules, making their &ldquoise "size" bigger, forming a compound called tan anhydride. tan anhydride is a red or brown substance that is hard to dissolve in water. When it slowly precipitates from the tea leaves, it always likes to attach to the inner walls of the teapot and the tea cup. Over time, you will see a layer of brown-red tea rust in the teapot and the tea cup.