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Barcodes are symbols that combine lines and blanks according to certain coding rules to represent certain letters and numbers. During identification, it is scanned with a bar code reader to obtain a set of reflected light signals. After photoelectric conversion, this signal becomes a set of electronic signals corresponding to lines and blanks, which are decoded and restored to corresponding alphanumerics. Then transfer it to the computer. The barcode recognition technology is quite mature. The error rate of reading is about one millionth, and the first reading rate is more than 98%. It is a kind of data with high reliability, fast input, high accuracy, low cost and wide application. Automatic collection technology.
Key factors causing barcode quality problems
Barcode size: The amplification factor must be greater than 0.80. When selecting the magnification factor, the overall design of the product packaging should be considered so that the printed barcode and the product packaging pattern are harmoniously coordinated; the size of the blank area on the left and right of the barcode must not be squeezed or reduced during the design, and the left and right blank areas must be guaranteed. The color must be the same as the color in the bar code; the truncation of the height of the commodity bar code symbol in any procedure will affect the scanning and reading of the bar code, so the height of the commodity bar code symbol shall not be truncated in principle.
Barcode color: Since the bar code reader generally uses a red light source, the red light has the highest reflectivity when irradiated on red, so red must not be used as a bar code, but only as an empty color; for transparent or semi-transparent printing carriers, it should be disabled in its packaging The same color of the item is used as the bar color, so as not to reduce the contrast of the bar and the air, and affect the reading; when using metal reflective materials such as aluminum foil as the carrier, the color of the body after the roughening treatment or a white layer on the body can be used as the empty color of the barcode The body of the unreflected reflective material is used as the bar color; the color with metallicity (such as gold) will cause the mirror reflection effect due to its reflectivity and glossiness, which will affect the scanner reading. Therefore, when printing barcodes with gold or reverse printing gold as empty colors, care must be taken; when the color of the packaging design conflicts with the color of the barcode design, the color of the packaging design should be changed based on the color of the barcode design.
Printing position: The preferred position for designing barcodes should be the lower right half of the back of the product packaging. When it is not suitable to place barcodes on the back of some product packages, you can choose to place barcodes on the lower right area of ​​the other suitable surface of the package. However, bar codes for bulky or bulky goods should not be placed on the bottom of the package. Under normal circumstances, the distance between the barcode and the adjacent edge of the product packaging should not be less than 8mm or greater than 102mm, which is mainly convenient for supermarket sales staff to scan with the goods in hand.
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