Walnuts are a common nut that is rich in protein, fat, vitamins, and minerals, which are beneficial for human health. However, if you peel off the shell of the walnut, you will find that there is a layer of yellow liquid inside, which is walnut juice water. If you accidentally get this liquid on it, you'll find that your fingers will quickly turn black and be difficult to wash off. Why is that?
It turns out that walnut juice is a natural dye containing phenolic compounds, the main ingredient of which is:Tannins(tannin) andJuglinol（juglone）。These compounds are able to chemically react with proteins on ** to form a layer of black substances that are difficult to remove. This reaction is irreversible, that is, once it is dyed black, it cannot return to its original color.
The dyeing effect of walnut juice is not only effective for the human body, but also can be used to dye textiles, wood, leather and other items. In fact, walnut juice is a natural dye with a long history, and as early as ancient times, people used it to dye hair, clothes, paper, etc. The color of walnut juice can range from light yellow to dark brown, depending on factors such as concentration, temperature, and reaction time. The dyeing effect of walnut juice is very long-lasting and does not fade easily, so it is considered a high-quality dye.
Since the dyeing effect of walnut juice is irreversible, the best way is to take precautions before contacting walnut juice to avoid walnut juice penetrating into **. Specifically, there are several ways to do this:
Wear gloves。This is the simplest and most effective way to prevent walnut juice from coming into contact with ** as long as you wear a pair of plastic or rubber gloves to avoid blackening.
Apply grease or lotion。If you don't have gloves, you can also apply a layer of grease or lotion on your hands before peeling walnuts to form a protective layer to prevent walnut juice from penetrating into the **. There is no limit to the types of oils or lotions, which can be edible oil, olive oil, sesame oil, moisturizer, hand cream, etc., as long as they can cover the surface, they can play a protective role.
Rinse with water。If you accidentally get wetted with walnut juice, don't panic, rinse your hands immediately with water, and try to wash off the walnut juice to reduce the degree of staining. If soap or hand sanitizer is available, it is best to use them to wash them to increase the cleaning effect. It is important to note that the rinse time should be as fast as possible, because walnut juice reacts quickly, and once it is blackened, it is difficult to remove.
What if it's already blackened with walnut juice?Is there any way to remove the black color of walnut juice?The answer is that there are some methods that can be tried, but the effect may be limited, and patience is required to wait for the natural update. Here are some commonly used methods:
Wipe with acidic substances such as lemon juice, toothpaste, vinegar, etc。These substances contain acidic components that react with the phenolic compounds in walnut juice to lighten their color and reduce the degree of staining. The specific operation method is to apply lemon juice, toothpaste, vinegar and other substances to the blackened area, gently rub it, then rinse it with water, and repeat several times until the color becomes lighter. It is important to note that these substances may irritate ** and cause discomfort, so avoid using substances that are too strong or too strong, and also avoid using them on wounds or sensitive areas.
Remove with physical methods such as scrubs, nail polish removers, etc。These substances have a physical friction or dissolving effect, which is able to remove the stratum corneum of the top layer, thereby removing the blackened part. The specific operation method is to apply scrub, nail polish remover and other substances to the blackened area, gently rub it, then rinse it off with water, and repeat several times until the color becomes lighter. It is important to note that these substances can damage**, causing dryness or allergies, so avoid using substances that are too excessive or too harsh, and also avoid using them on wounds or sensitive areas.
Walnut juice is a natural dye that can chemically react with the protein on ** to form a layer of black substance that is difficult to remove. The best way to avoid blackening walnut juice is to take precautions such as wearing gloves, applying grease or lotion before touching walnut juice. If it has been blackened with walnut juice, you can also try to wipe it with acidic substances such as lemon juice, toothpaste, vinegar, or remove it with physical methods such as scrub and nail polish remover, but the effect may be limited, and you need to be patient and wait for ** natural renewal.
The dyeing effect of walnut juice has caused us some trouble, but it also shows the mystery and diversity of nature. Walnut juice can be used not only for dyeing, but also for some other purposes, such as:
Antibacterial and anti-inflammatory。The phenolic compounds in walnut juice have antibacterial and anti-inflammatory effects, and can be used for **some** diseases, such as dermatitis, boils, scalds, etc. As long as walnut juice is applied to the affected area, it can have an anti-inflammatory and pain-relieving effect.
Insect repellent and antiseptic。The juglol in walnut juice has the effect of inhibiting the growth of some microorganisms and insects, and can be used to prevent spoilage and insect damage in wood, textiles, food and other items. As long as the walnut juice is sprayed on the items that need to be protected, it can have the effect of antiseptic and insect repellent.
Beauty and beauty。The tannins in walnut juice have astringent and antioxidant effects, which can be used to improve the elasticity and luster of walnut juice and delay aging. As long as the walnut juice is diluted and applied to the face, it can have a beauty effect.
The above is the popular science article brought to you by Science Xiaoquan about 'how to wash the handle of walnut juice when the handle turns black', I hope you can learn some useful knowledge from it, and I hope you can like walnuts, a delicious and healthy nut. If you have any questions or ideas, please leave a message in the comment area and we will work together. You are also welcome to pay attention to Science Wiki to get more interesting popular science content. Thank you for reading and have a great day!