Why do products use bar codes?

Barcode began in the 1970 s, has been widely used in all kinds of goods in the world, for commercial activities and commodity management provides a great convenience, the article numbering center of China was established in 1988, the barcode is also widely used in various fields in our country, including the application in publications, in April 1991, China was officially accepted as an international article numbering association member, The barcode prefix code is 690.

Bar code, also known as bar code, is composed of a set of regular arrangement, different width, black and white, parallel adjacent lines, and with the corresponding characters of the code, used to express a certain information.

Bar code a regular array of bars, empty meaning: bar, is the low reflectivity of the bar code, that is, black or color stripe part; Empty is the higher reflectivity part of the bar code, that is, the white or colorless stripe part. Bar code is a kind of automatic identification technology, is the use of photoelectric scanning reading equipment to computer input data special code, this code includes the product name, specifications, prices and so on.

First, the use of bar code function

(1) Automatic reading recognition. As long as the scanning reader scanning bar code label, the computer can automatically read identification, determine the code of goods, and then find pricing, do accumulative settlement, the total amount of output. It has the characteristics of fast and accurate.

(2) To be able to classify, summarize and analyze the information of commodity sales, which is conducive to the smooth operation and management activities.

(3) Timely feedback of sales information to the production unit through computer network, to narrow the space-time difference of information transmission between production, supply and sales.

At present, the world's commonly used code system has ENA bar code, UPC bar code, 25 bar code, cross 25 bar code, Codebar bar code, 39 bar code and 128 bar code, and the most commonly used goods is EAN commodity bar code.

EAN commodity bar code is also known as general commodity bar code, developed by the International article code Association, general around the world, is currently the most widely used in the international a commodity bar code. EAN commodity bar code is divided into EAN-13 (standard version) and EAN-8 (shortened version) two kinds.

The code of commodity bar code follows the principle of uniqueness to ensure that commodity bar code is not repeated throughout the world, that is, a commodity item can only have a code, or a code can only identify a commodity item. Different specifications, different packaging, different varieties, different prices, different colors of goods can only use different code.

The standard size of the bar code is 37.29mmx26.26mm and the magnification is 0.8-2.0. When the printing area allows, bar codes with a rate of 1.0 or higher should be selected to meet the requirements of literacy. The smaller the magnification of bar code, the higher the printing accuracy requirements, when the printing accuracy can not meet the requirements, easy to cause bar code reading difficulties.

The birth of the barcode of goods greatly facilitates the circulation of goods, modern society has been inseparable from the barcode of goods.