A barcode consists of a group of printed and variously patterned bars and spaces, numeric and sometimes alpha numeric data, that are designed to be scanned and read into computer memory as identification for the object it labels.
The barcode consists of a single row of bars. 1-D barcodes are suited for applications in which only a few characters are stored. Barcodes store their data in the horizontal width and the information stored is highly redundant. They are therefore more resistant to data degradation. Barcodes are usually printed along the long axis of the card, and are read using swipe readers which use either visible or infrared sensors. Barcodes are usually used to store a single unique character string, used as a pass code, in access control or other holder identification systems.
How to print barcodes onto a plastic card?
The "height" of a Barcode contains no information, but the higher each bar is made, the easier it may be to read when presented to a reader. About 0.4 inch (1 cm) centered on the swipe reader sensor, should normally be adequate. Barcodes should always be printed using the K panel (Black Resin) because this is opaque to both visible and infrared sensors. As a security measure it is possible to print the black resin Barcode on top of a dark YMC color panel in such a way that it cannot be photocopied.
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