The composition of a typical barcode is standard in all countries and can be read by inventory management systems. Traditional barcodes consist of the following 3 components:
Quiet zone (margin)
A quiet zone is a blank margin located at either end of the barcode. If the quiet zone isn’t wide enough, it’ll be difficult for the scanner to read the barcode. Therefore, the minimum margin distance from the outermost bar of one symbology to the outermost bar of another symbol is 2.5 mm.
Start/Stop characters are characters that represent the start/end of the data. These characters will vary slightly depending on the barcode type.
Check digit (symbol check character)
Check digit is a digit to validate the barcode. Thanks to its symbol check character, you can check if the barcode data encoded in the barcode is correct.