Retail trade items are commonly known as retail commodities, which mainly refer to commodities that are scanned and settled through POS at retail terminals. The combination packaging of a can of beer, a bottle of shampoo and a bottle of conditioner can all be regarded as retail commodities.
In my country, the identification codes of retail products mainly adopt the three data structures of GTIN, namely EAN/UCC-13, EAN/UCC-8 and UCC-12. Under normal circumstances, the 13-digit digital code structure is used to represent the EAN-13 bar code. Only when the product is exported to North America and specified by the customer, can the UCC-12 code (indicated by the UPC bar code) be applied. If Chinese manufacturers need to apply for UPC commodity barcodes, they must go through the unified processing of the China Article Numbering Center. The structures of EAN/UCC-13 and EAN/UCC-8 are shown in Figure 1, Figure 2, and Figure 3, respectively.
(1) When the prefix code is 690, 691, the code structure of EAN/UCC-13 is shown in Figure 1.
(2) When the prefix code is 692, 693, the code structure of EAN/UCC-13 is shown in Figure 2.
When compiling commodity identification codes for trade items, the following basic principles should be observed:
Assuming that the manufacturer identification code assigned to a certain company is 6901234, Table 1 shows the coding scheme of some of its product identification codes.
According to Table 1, we can see:
In my country, EAN/UPC product barcodes are used to represent retail products. EAN/UPC product barcodes include EAN product barcodes (EAN-13 and EAN-8) and UPC product barcodes (UPC-A and UPC-E). EAN-13 and EAN-8 barcodes are shown in Figure 4. UPC commodity bar code is the bar code symbol representation of UCC-12 identification code, see GB 12904-2003 for details.
EAN-13 product barcode is also called standard product barcode, which means EAN/UCC-13 code. EAN-8 product barcode is also called shortened product barcode, which means EAN/UCC-8 code.
Under normal circumstances, users should try to use EAN commodity barcodes, especially EAN-13 barcodes. However, in the following situations, EAN-8 barcodes can be used.
A complete EAN-13 product barcode is shown in Figure 5
The magnification factor of EAN/UPC barcode symbols is generally selected within the range of 0.80～2.00. The bar code symbol is enlarged or reduced with the change of the enlargement factor. See GB 12904-2003 for specific size requirements. When the magnification factor is 1.00, the main dimensions of EAN-13 and EAN-8 product barcodes are shown in Figure 6 and Figure 7.
The width of the blank area on the left and right sides of the barcode changes with the change of the magnification factor. When the magnification factor is 1.00, the minimum width of the left and right blank areas of the EAN-13 product barcode are 3.63mm and 2.31mm, respectively; the minimum width of the left and right blank areas of the EAN-8 product barcode are both 2.31mm; as shown in Figure 6, Shown in Figure 7. The width of the blank area on the left and right sides is of great significance to the successful reading of the barcode. Therefore, the width size requirement is one of the main parameters to measure the quality of the barcode symbol.
Bar color matching refers to the combination of the bar color and the blank color in the barcode. Barcode is realized by using a special reading device to distinguish the border and width of the bar space. Therefore, it is required that the color contrast between the bar and the space is as large as possible. Generally speaking, white as the base and black as the strip is the most ideal color combination. The color combination scheme shown in Table 2 is for reference only for bar code symbol designers. The color matching of the strips should finally meet the relevant requirements of GB 12904-2003.
The selection of the barcode position of retail products should be based on the relatively uniform symbol position, the symbol is not easily deformed, and it is easy to scan and read. Preferred barcode symbolThe number position should be in the lower right half area on the back of the product package.
For some unpackaged products, the barcode symbol of the product can be printed on the label. If the product has a flat surface and allows to stick sticker Label or sewn cloth label, barcode symbol can be printed on the label, see Figure 13.
Qualified EAN/UPC barcode symbol quality is a prerequisite for POS stores to achieve accurate and fast scanning and settlement of goods. The quality of barcode symbology is directly related to the interests of manufacturers, sellers and printing companies. In order to ensure the printing quality of bar codes, the China Article Numbering Center and its branches have carried out bar code original film production services and the certification of the bar code printing qualifications for products of printing enterprises. The company can customize the original bar code film at the coding center or its branch according to its actual situation, and print the bar code at a printing company that has obtained the qualification to print commodity bar codes. China Article Numbering Center and its branches also provide bar code symbol quality inspection services for member companies. To avoid unnecessary economic losses for enterprises.
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