A barcode printer (or bar code printer)
is a computer peripheral for printing barcode labels or tags that
can be attached to physical objects. Barcode printers are commonly
used to label cartons before shipment, or to label retail items with
UPCs or EANs. The most common barcode printers employ one of two
different printing technologies. Direct thermal printers use a printhead
to generate heat that causes a chemical reaction in specially designed
paper that turns the paper black. Thermal transfer printers also
use heat, but instead of reacting the paper, the heat melts a waxy
or resin substance on a ribbon that runs over the label or tag material.
The heat transfers ink from the ribbon to the paper. Direct thermal
printers are generally less expensive, but they produce labels that
can become illegible if exposed to heat, direct sunlight, or chemical
vapors. Barcode printers are designed for different markets. Industrial
barcode printers are used in large warehouses and manufacturing facilities.
They have large paper capacities, operate faster and have a longer
service life. For retail and office environments, desktop barcode
printers are most common.
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