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Have you ever turned the milk box around to find the date of production? Have you ever been confused with the tiny and fuzzy date of production? Now we have the solution!
It is a new design of color printing material for bar code.The color of bar code shows how fresh the milk is.Black represents unfresh.You only need to take a glance at the color of bar code on the milk box, then you know weather the milk goes bad or not.When all parts of the bar code turns red,you should throw it.When you see the two parts of bar code of fresh food has turned red,you may choose more fresh.
Danping Shen Leijing Zhou Huifei Bao Jin Ge