How important is the laser marking machine in food packaging bags?
"If the shelf life is only one day, will the merchant change the label and sell it the next day?" Mr. Xu, a citizen, found out that there were four bags of steamed buns packed in plastic bags with stickers on the seals while shopping in a supermarket in Jinan. The label indicates the packaging date accurate to the minute, and the shelf life is one day.
According to media reports, since May this year, Mengniu's sales manager in Yiwu, Wang Mou, has purchased more than 5,000 boxes of Mongolian milk products that are about to expire at half price, and sold them to Yiwu and other places after the production date is changed 6 months. Xingju. The reporter's investigation found that the production date used by citizens when buying food is likely to be manipulated, and the supervisory department has not clearly stipulated the method of labeling the food production date.
Citizens report: The shelf life of steamed buns is written on the sticker On August 26, the reporter visited several supermarkets in the city and found that the pasta such as steamed buns and sesame seeds, bean sprouts, dragon fruit and other vegetables and fruits were packaged in plastic bags or plastic wrap, which marked the date of packaging and shelf life.
"We have an advance estimate of daily sales, and we won't have too many goods. Food that cannot be sold on the day will also be processed internally." A staff member of a supermarket food counter said that internal processing is the purchase of employees and the second. Return to the factory. "But there will never be a situation where the label is replaced and put on the cabinet again."
The reporter selected common foods such as sweets, pastries, popsicles, dairy products, meat products, biscuits, etc. Strong, almost impossible to erase or modify. And some products with low brand awareness use inkjet printing to mark the production date, which is not so reliable. The reporter bought a box of six-pack rose cakes. The packaging of the sachet was marked with the production date of "20120816". The black ink could be completely removed by gently rubbing it with a wet paper towel.
After the production date is erased, it is not difficult to spray a new date. The reporter searched for "laser marking machine" on a shopping website, and the results generated were advanced laser marking machines worth 100,000 yuan and so on. Some sellers also said that the purchase of laser marking opportunities comes with a liquid to eliminate ink.
Large-scale food companies are often equipped with laser marking machines worth tens of thousands of yuan, with solid fonts and discontinuous graininess. However, some small and medium-sized enterprises are equipped with inkjet printers due to cost issues, and the expensive one is only a few thousand yuan. Because the ink adhesion is not strong, the inkjet fonts are easy to blur with one touch. If you use pine perfume or banana water, you can eliminate them cleanly.
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