Generally, commodity bar codes consist of 13 digits, which are divided into prefix part (the first 3 digits), manufacturer identification code with prefix (7 or 8 digits), commodity item code (5 or 4 digits) and check code (13 digits). Only when the printing area of bar code symbol of 13 bit code exceeds a quarter of the maximum area of commodity label or an eighth of the total printable area; When the maximum area of the commodity label is less than 40 cm or the total printable area is less than 80 cm; When the product itself is a cylinder with a diameter less than 3mm, you can apply for 8-bit coding in any of the above cases.
Commodity bar code is equivalent to product ID card, which can ensure that the code of each commodity item of each enterprise is unique and universal in the world. Each product has its own unique bar code. By scanning the bar code, the salesperson can know the attributes, price, production date and other information of the product.
The difference between 13 EAN code and 14 barcode.
The 1 and 13 EAN barcodes with the same point 69 and the 14 barcode with the same point 169 are all commodity barcodes, all of which are applied in China Article Coding Center; Different manufacturers have different manufacturer identification codes. For example, the 13 EAN barcode of an enterprise starts with 690000, then the barcode of 14 commodity must start with 1690000.
2.69 The EAN barcode with 13 digits at the beginning can be used for product cartons, boxes, bottles, bags or directly attached to product bottles. The 14-digit commodity bar code at the beginning of 169 is not a commodity bar code in the ordinary sense, but is generally used as a logistics code (similar to the bar code of the courier), and can only be used as the outermost packaging material of the product, generally in the packaging box of the product.
Barcode source
More than 60 years ago, there were two young people in the United States, bernard hill Ford and norman woodland, who were studying at drexel Institute of Technology in Philadelphia. 1948 One day, Xiaoyin overheard the conversation between the chairman and the principal of the food chain supermarket in the college auditorium. The chairman hoped that the school could help them develop a device that can automatically obtain product information when the cashier checks out, but the principal politely refused. This incident aroused the interest of silver and woodland.
Woodland was inspired on the beach in Florida. He recalled: "I put four fingers into the sand and unconsciously drew four lines to myself." God, these four lines can be wide or narrow. Isn't it Morse code that can replace long strokes and short strokes? "Morse code, also known as Morse code, is a kind of on-off number, which expresses different English letters, numbers and punctuation marks through different arrangements. Woodland's mind flashed, and he caught the secret of the bar code.
1949101On October 20th, Yinhe Woodland submitted a patent application report, in which the structure of barcode and the design principle of code reader were elaborated in detail. 1952, 10 year10.7, this patent was approved, thus establishing his and Silver's status as inventors of bar codes.