Is it true that the brighter green raisins are said to be formaldehyde?

That's great. High-tech such as formaldehyde filter has not yet appeared. Homemade wine has low formaldehyde content, so don't worry. Don't be infected by miscellaneous bacteria during fermentation. The fermentation container used is food-grade and will be very safe. . First, methanol, not formaldehyde. There will be this substance in all the processes of brewing food, so don't be too alarmed. For example, the brewing process of soy sauce, canned food, fermented bean curd, white wine and vinegar in our daily life will produce some methanol or even some ... Generally, the simple wine brewed by ourselves is harmless, but the length of time you want to keep it is uncertain. Try to finish it in a short time. My mother's menstrual wine is only a few hundred pieces of grapes, but it's delicious. Just don't leave it too long. This is all a joke, ignorance. Formaldehyde is everywhere, and the rice food you eat will also produce formaldehyde during digestion: it is normal for fermentation to produce a small amount of formaldehyde. Generally speaking, wine does not contain formaldehyde, and sulfur dioxide is added during wine brewing. Sulfur dioxide is essential in the process of wine brewing, and its main function is to prevent oxidation and sterilization. Using sulfur dioxide before fermentation can kill bacteria and wild yeast in grape powder cream, and can also kill yeast during fermentation. It should be methanol, not formaldehyde; Methanol is related to the fermentation process. Taboo of wine brewing method: 1, gas is produced during fermentation, so the container mouth should not be sealed, just cover it slightly; 2, the whole process can't contact with iron and copper tools, which will bring iron and copper damage; 3. You can't make wine with rotten grapes, otherwise the wine will be sour and taste bad; 4. Grapes need to be crushed and then put into containers, which is beneficial ... However, experts also said that it is not recommended for citizens to brew wine at home, because the fermentation process of homemade wine is difficult to master, and many indicators cannot be controlled, which may easily lead to excessive methanol content. This is a little serious. Although you can't listen to all the experts, you can't completely ignore them. Formaldehyde is a bad thing after all! . Rumors of excessive formaldehyde in online homemade wine have made these citizens who like to make wine early adopters more worried 1. What is the truth? The national standard clearly stipulates the methanol content, which requires that every liter of wine must be tested for methanol content. & gt adopt it. However, experts also said that it is not recommended for citizens to brew wine at home, because the fermentation process of homemade wine is difficult to master, and many indicators cannot be controlled, which may easily lead to excessive methanol content. This is a little serious. Although you can't listen to all the experts, you can't completely ignore them. Formaldehyde is a bad thing after all!