"What the hell can I use to wash it off?”
Recently, a blogger posted ** that because he lost the game, he was punished with a "pork seal" on his face and neck, but he didn't expect to find out the next day that this "inspection is allowed to be slaughtered" seal could not be washed off. The blogger said that the seal and ink were purchased online, and there was no label on the ink.
Netizens enthusiastically supported and recommended bloggers to try toilet cleaners, gasoline cleaners, etc., but they still couldn't perfectly clean up the stamps on the blogger's face and neck, and they also made ** "simmering".
Some netizens suggested that it would be better to take the opportunity to evaluate the liquid foundation and concealer Source: Douyin @ Urban Scene** screenshot.
In fact, as early as 2015, pork stamps were popular on the Internet once. A woman's extramarital affair partner suddenly stamped a pork quarantine stamp on her body, threatening the woman to divorce and have sex with him, "This seal can't be washed off, and your husband won't let you go when he sees it."
So, what exactly is a pork stamp?Why can't it be washed off?
What is a pork stamp?
First of all, answer the question, why should raw pork be stamped?
According to the "Pig Slaughtering Quality Management Standards" issued by the Ministry of Agriculture and Rural Affairs, if the pig carcass is qualified, the official veterinarian shall issue the "Animal Quarantine Certificate", affix the quarantine inspection seal, and add a quarantine mark to the meat products that are divided and packaged. In addition, for pig products that have passed the meat quality inspection, the pig designated slaughterhouse (field) shall be stamped with the seal of the meat quality inspection and the meat quality inspection certificate.
That is to say, there must be two seals on the qualified raw pork, the quarantine certificate seal and the meat quality inspection certificate seal.
There are three types of quarantine certificate seals: "certificate inspection" rolling seal, "high temperature" triangle seal and "destruction" rectangular seal.
Source: Screenshot of the page of Guizhou Provincial Animal Health Supervision Network.
According to the notice of the General Office of the Ministry of Agriculture and Rural Affairs on standardizing the relevant requirements for animal quarantine certificate seals and related mark styles, the color of the certificate seal stamped on the quarantine-qualified meat is uniformly blueFor the "high temperature" or "destruction" stamp oil stamped on the meat that fails to pass the quarantine, the color is uniformly red.
The meat quality inspection certificate seal is divided into two seals, large and small, the large round seal is stamped on the pig carcass that has passed the meat quality inspection, and the small round seal is stamped on the "meat quality inspection certificate".
Source: Screenshot of the page of Guizhou Provincial Animal Health Supervision Network.
Whether it is a quarantine certificate seal or a meat quality inspection certificate seal, it needs to be printed on the surface of the pig carcass with the help of pigments, to ensure that they cannot be removed by cleaning during processing and use, to avoid counterfeiting or other problems, but also to ensure the safety of meat - Article 46 of the Food Safety Law stipulates that food producers shall not use chemical substances other than food additives and other substances that may endanger human health in food production, so the choice of pigment is very important.
At present, there are two commonly used ink colors: red and blue, and the composition of ink includes dyes and solvents.
Among them, the dyeing agent of red ink mostly uses gentian violet (methyl violet) or compound red (acidic fuchsin), food coloring, etc., and the solvent mostly uses water, alcohol, glycerin, etc. Some regions use methyl violet solution and 75% ethanol, and some use food coloring, glycerin and water to blend, and the formula and concentration vary from place to place.
However, gentian violet is an industrial dye, and consuming products with such dyes may lead to an increase in the incidence of diseases such as laryngitis, rhinitis, dermatitis, and conjunctivitis. In addition, prolonged exposure to gentian violet can also cause headaches, nausea and vomiting, and there are even studies that believe that consuming such products increases the probability of causing cancer. In recent years, due to people's increasing concern about food safety issues, food-grade raw materials have begun to replace ink formulations, such as using beet red and carmine instead of dyes, and using liquor instead of alcohol.
The blue liquid of the seal is a special liquid for food blue inspection marking, which is mixed and dissolved by mixing bright blue, alcohol, glycerin, vitamin C, zinc sulfate, and distilled water. However, not all of these ingredients are necessary, and vitamin C and zinc sulfate can be removed or one of them can be removed, and the other components remain the same.
Brilliant Blue is non-toxic and harmless, and other ingredients such as glycerin, vitamin C and zinc sulfate do not cause any harm to the human body, and these ingredients are in line with the traditional Xi of the meat inspection industry.
Therefore, there is no need to worry about the stamp on the pork is not clean or harmful to the body, on the contrary, the stamp pork is qualified and can be eaten with confidence.
* The stamps on the blogger's face and neck are blue, if it is really a pork stamp, it should be a special liquid for food blue inspection marks as the printing oil. To prevent it from being easily erased, the brilliant blue in this ink may contain a chemical agent called Coomassie brilliant blue.
The crux of the matter is Coomassie Brilliant Blue.
Is it true that pork stamps can't be washed off?
Let's start with the conclusion, the ink used in pork stamps is really difficult to wash off.
Coomassie brilliant blue is a triarylmethane dye, which can be divided into two types, G-250 and R-250 structurally, and the chromogenic group of its molecule is a triarylmethane group located in the middle of the molecule. Coomassie brilliant blue is a stain, it is combined with proteins to appear blue-purple, so its biggest application is in the staining of proteins, the use of Coomassie brilliant blue method to detect proteins is one of the commonly used protein detection methods. In the field of forensics, Coomassie Brilliant Blue is also often used to color fingerprints at crime scenes.
Molecular structure of Coomassie Brilliant Blue丨Source: Reference [4].
Coomassie Brilliant Blue will be bound to the protein in ** by van der Waals force after contact, and this reaction is relatively stable and cannot be washed off with ordinary reagents after the reaction.
However, there is a difference between a pork seal on a dead pork and a person.
The mark on the dead pork is more difficult to wash off, because the pig at this time has been dehaired, and washed cleanly, there is no oil on the surface, the pig cells have lost their activity, will no longer metabolize, will no longer produce oil, pigment will accumulate in the epidermal layer, so it is difficult to wash off with ordinary methods.
There is a layer of grease on the surface of the human person, which can isolate the pigment in the ink to a certain extent. Therefore, if you don't just take a bath and wash off all the oil on your body, then when you just put on the pork seal, you can use hydrogen peroxide or alcohol to wash off the blue pork seal, but you also need to rub it vigorously for a period of time, which has a certain amount of damage.
However, if the ink has not been cleaned in time on the person's **, the pigment in the ink will slowly penetrate into the epidermis, and then use a special solution to clean it at this time. The blogger who had stamps on his face and neck in front of him, after trying various methods, finally washed off the stamps, at the cost of washing the stamped places reddened and swollen ......
After forcibly washing off the pork seal**丨Source: Douyin @idol·Chen Zhenhua**Screenshot.
In fact, at this time, don't rush to rub off the seal, the most reliable way is to wait for the metabolism of human epidermal cells.
The basal layer of the epidermis layer will continue to produce cells every day, and the original cells will continue to move upwards until the cells of the stratum corneum are formed, and finally aging and falling off, this process is the metabolic process of the epidermis. It takes 14 days for a new cell to move from the basal lamina to the clear layer (prostratum corneum) and 14 days from the formation of the stratum corneum to the time of senescence and shedding.
That is to say, after waiting for about two weeks after the seal, the cells will naturally age and fall off, and the pigment on the ** will also fade until it disappears.
However, although pork stamps can disappear on their own over time, let's try less with curiosity. After all, it is still you who is embarrassed in the time you wait for the seal to disappear.
References: 1] Liu Tian, Zhang Na, Duan Renjie & Wang Kun. (2012).Application of food-grade pigments in sliced pork stamping. Meat Industry (08), 31-32
2] Shan Jialei, Ma Chong, Zhao Weihua, Li Weihua, Li Ruihong, Shi Quan. Zhang Jie. (2016).Analysis of the current situation and problems of the use of seal oil in the slaughtering process. China Animal Quarantine (04), 23-25+32
3] Jiang Wei. Special solution for food blue inspection marking: CN1277355A[P].2000-12-20.
4] Lee Tak-sun. (2020).Specific recognition of target molecules by Western blotted Coomassie Brilliant Blue Chromogenic Hydrogel (M.S.**, Fuzhou University).