Barcodes are in use since 1960s, its first industrial use was for identifying railroad cars. In recent times, linear barcodes are widely appearing on grocery shelves. In fact, barcode technology is seen everywhere and used by almost all industries for identifying or tracking something accurately. Barcode printing mostly use thermal label technology to create high-quality labels. These thermal label printers can print various types of barcodes depending on several variables including purpose and use, encoded data and printing, standards and mandates, and decoding methods. Barcodes are also called symbologies, which are standard for defining any printed symbol. Also, based on these symbols a barcode scanner reads and decodes the barcodes.
Barcode symbology is like the alphabets in a language, the number of bars and spaces symbolize particular characters, defining technical details of the barcode. The width of the bar as well as the character set – all are part of the encoding, which the barcode scanner decodes. Printing barcodes requires to label formats along with software supporting bar coding. Once the label is designed, a printer is required to print the tags. However, the printer must be able to produce bar codes and support the specific barcode symbology.
As mentioned, barcode printing involves two types of thermal label printing methods. These are direct thermal label printing and thermal transfer label printing. Both the thermal label-printing technologies use the heated pins of a thermal print head to create the printed image. Thermal transfer label printing also requires a chemically treated ribbon to create a more durable and long-lasting labels. Direct thermal label printing, in contrast, does not require any ribbon to create images. Instead, they use a heat-sensitive paper. The heated pins of the print head apply heat to the heat-sensitive paper to create the image direct on label material.
Thermal transfer label printers are generally used for permanent labeling applications and work well with a wider variety of materials. They are more expensive. However, thermal transfer labels provide unrivaled quality of printed labels that are resistant to heat, scratch and harsh environment and chemicals. Direct thermal labels, on the other hand, are mostly use for creating price tags, coupons, put away labels, receipts, shipping labels and other common printing applications that are not likely to be stored for extended period. Some may even use regular Inkjet and Laser printers to create barcode labels. However, such printers may not come with native support for barcode symbologies. In that case, one has to upgrade the printer with additional programming and fonts supporting bar coding.
A number of common interfaces are used in barcode printing that allows simple integration with the host computer systems. If you are opting for a Laser or Inkjet printer to save money, be careful. Some of the printers, especially the Laser printers print an entire sheet of labels instead of one label at a time, which will surely cost you more, as there will be wastage. With thermal label printers, you can eliminate such wastage.
Thermal label printers that are using for bar coding can support multiple symbologies, whereas common Inkjet and Laser printers may not offer multiple symbologies and might not be able to print any given barcodes. Thus, read the printer specifications listing symbologies that the machine supports, before opting for a particular type of barcode printer.