Yellow croaker dyeing
Open secrets in the industry
Passing through five fish stalls in a row, Pony said that all the yellow croaker they sold were dyed.
65438+15: 30 am on October 24th, outside an aquatic product wholesale market. A fishmonger who has just finished loading goods is preparing to leave the parking lot on a tricycle. A stevedore next to him asked, "Brother, let's go." "Well, go home and wash the fish." The man said, riding a tricycle and roared off.
"After some hawkers bought yellow croaker from the wholesale market, washing fish is a necessary process. Go home and wash the fish with yellow powder to sell better. " When the reporter told Pony about this scene he encountered, he made the above explanation. "Some ordinary people may have heard of yellow croaker dyeing, but for insiders, it is already an open secret. The situation in some morning markets may be more serious. " Said the pony.
Accompanied by Pony, the reporter visited the morning market near Taoyuan Street in Zhongshan District. "This fish is dyed." Looking at a box of iced yellow croaker, the reporter carefully asked the pony for proof. "This fish was not dyed before freezing. Look at its true colors. " Pony denied the reporter's guess. "That can wait until it melts." The reporter is somewhat dissatisfied. "When it is frozen, its scales will become warped and it is not easy to change color. Colored yellow croaker is basically fresh. " The pony replied.
At the next fish stall, the pony pointed to the yellow croaker being sold and said, "This fish is dyed." Passing five fishmongers in a row, the pony said that the yellow croaker they sold was dyed. "How to prove it?" The reporter asked. "Look at this house, the water stained with fish hasn't poured yet." Pony said, pointing to an incubator filled with Bordeaux liquid.
The reporter came to the booth and talked with the middle-aged male stall owner wearing a hat. "How much is your yellow croaker?" "10 yuan two Jin." The stall owner replied. "It looks a little yellow. It won't dye." The reporter expressed doubts. "Don't worry, certainly not dyed. I have been selling fish here for a long time. " The stall owner said. "What's the water in the box next to it?" The reporter looked at the incubator and asked. "Oh, dirty water, I didn't have time to pour it." The stall owner said. After buying a catty of fish, the reporter left.
"How to identify whether the yellow croaker is dyed?" The reporter asked Ma Xiao for advice. "I'll show you the paint later." Say that finish, pony began to call and contact peers. After walking for a while, the pony brought back an extra drink bottle, which contained a liquid with chestnut color and precipitation. "This is the pigment for coloring yellow croaker. I contacted a friend and got it. " Said the pony.
"Stop, that saury is dyed." On the way back, the pony stopped. After the pony's reminder, the reporter found that the surface of this saury was very bright. As long as your fingers gently slide over the fish, you will get a silver substance. It turns out that this substance is difficult to wash off when it is dry. A kilo of saury 16 yuan, the reporter bought one at the price of 15 yuan. "We call it silver powder, with a price of 100 yuan per barrel. It's not easy to get now. I contacted several friends and didn't get them. " Said the pony.
Pony has done seafood business and has a certain understanding of the quality of fish sold in the market. After a trip, Pony said, "More than a dozen small yellow croaker sold in the morning market near here have been dyed, but the difference is that they are dyed more and less."
Hands-on operation
How do fish put on beautiful coats?
"Color sells a box, but it may only sell a catty if it doesn't. The difference is so big! "
On February 18, around 1 1 o, Pony first picked out the yellow croaker bought by the reporter, then picked out the yellow croaker that was hardly stained, and then began to demonstrate the dyeing process.
He first poured about a quarter of the red liquid in the beverage bottle into the basin, then turned on the tap and put in half a basin of clear water. "This red liquid is blended and turned out to be yellow powder. His bottle is a little thin and cold water, otherwise this bottle of paint can be used more than ten times. " The pony said while operating, "the dosage is not so absolute, you can do it at your discretion."
After pouring clear water, the whole basin of water turned into lemon yellow. The pony put some fish in the leaking basin and moved the leaking basin up and down in the water. "Fish is directly soaked in water and is not easy to be colored." Feeling that the dyed color is a little light, the pony directly pours the red liquid on the fish and continues to rinse. A few minutes later, the pony completely fished out the fish from the water, and the original white yellow croaker turned into a brightly colored small yellow croaker, completing the process of "ugly duckling turning into swan". The whole process can be described in one word: simple. The reporter personally tried this operation with little technical content, but the dyed yellow croaker became too yellow because it was not careful enough. "Broken, a little too fake, can't sell?" The reporter said with regret. Pony's answer surprised the reporter. "You are an amateur. The more Huang Yue sells! "
"Why should a good yellow croaker be dyed and sold at a good price in order to look fresh?" The reporter asked inexplicably. "In fact, just to look good! Stale fish scales are broken and difficult to color. The purchase price of small yellow croaker is three or four yuan, which is not high in itself, and the cost of pigment is not high. You can't pretend or sell it at a high price with other fish dyes. This is to look good and increase sales. Imagine a painted car and a freshly waxed car. Which one would you buy at the same price? "
"Why do you have to reinvent the wheel?" The reporter questioned. "I can't sell it without coloring. I once bought croaker and sold it without coloring. As a result, a box of 80 kg of 50 kg fish was not sold, so I added salt myself. If you sell a box of colored ones, you may only sell one catty if you don't. The difference is so big! " Pony looks a little excited.
Cosmetic ingredients
Contains substances harmful to human body.
Silver powder scraped from saury is generally used for heating and contains a lot of heavy metals.
So what is this mysterious "solution"? At 3pm on February 2nd/KLOC-0, the reporter interviewed Nong Shao Zhuang, director of China Food and Nutrition Society and professor of dalian polytechnic university Food College. After observation, Professor Nong identified the pigment as "sunset yellow". "The pigment used for coloring yellow croaker is a synthetic pigment in food pigment, which belongs to' sunset yellow' in color. This pigment looks orange-red, and when dyed with mixed pigments, the color of the dyed object will appear yellow. The specific color depth depends on the proportion of pigment preparation. Nong Shao Zhuang said that the cost of pigment "sunset yellow" is very low. A kilo of "sunset yellow" only costs 60 yuan money, but this bottle of pigment can dye a ton of fish.
Nong Shao Zhuang pointed out that there are two kinds of "sunset yellow": industrial and food. Its function is to make things brighter, not to cover up the quality problems of food itself. It is illegal to use "sunset yellow" to color yellow croaker to make it look bright. At the same time, he also pointed out that although sunset yellow is allowed to be used within the prescribed scope, it is a synthetic pigment after all, and the aluminum ingot inside contains aluminum. If vendors add a lot, long-term consumption of such fish will have a certain impact on the brain, especially for sensitive people such as pregnant women and infants.
Farmer Shao Zhuang saw the silver powder scraped off the swordfish, and said it was silver powder. Generally speaking, it is the powder we usually use to brush the heating. It contains a lot of heavy metals, such as lead and mercury, which is very harmful to human body. This kind of silver powder, if eaten, will do great harm to the liver, kidney and other functions of the human body, and will also damage the nervous system of the human body. These things are very cheap, about 100 yuan a barrel, which can be bought in building materials stores. Silver powder for heating is soluble in gasoline, and silver powder for fish is soluble in alcohol and other liquids, so it can't smell. Its adhesion is very strong, and it is difficult to remove it as long as it is dyed on fish. Nong Shao Zhuang explained.
Distinguish dyed fish
The jaws of healthy fish are almost white.
When verifying the white paper detection method provided by the public, the reporter found that there was no obvious color on the white paper rubbed with dyed yellow croaker, which was not easy to use. According to the verification, the reporter summarized several simple and easy identification methods.
1, test method of white vinegar. Pony used a lot of white vinegar directly when cleaning the leaky basin. He said that the color of fish dyed with white vinegar will be lost, but if the fish is natural, it will not be lost. This identification method has also been affirmed by Professor Nong Shao Zhuang. Aluminum is soluble in acid, but natural pigments are insoluble.
2. Appearance appraisal. Pony told reporters to look at the mouth and gills of the fish with undyed yellow croaker. The unstained fish is almost white. You can also open the fish's mouth. If the fish is dyed, yellow water may remain in the mouth. Professor Nong Shao Zhuang also suggested that citizens can also observe fish scales in the sun when shopping, and the uniform color on the fish scales must be dyed.
3, too yellow fish should be cautious. Zhao Yongbo, a fish researcher at Dalian Museum of Natural History, told reporters that yellow croaker is named after its yellow color, with obvious abdomen and natural color. However, people think that the fresher the yellow croaker is, the deeper the water is, the yellower it is, which is totally a misunderstanding. The color depth is only related to factors such as water temperature. There must be something wrong with the yellow croaker with too bright color.
4. Scrape your nails. Swordfish coated with silver powder can scrape off the silver powder when scraping the surface of the fish with fingernails, but this trick is only useful for swordfish coated for a short time. The color of saury can only be identified by its appearance. Some swordfish are so bright that they can even reflect light. You must not buy them. Said the pony.
(Yang Dehuan)