![]() ![]() Two Dimensional Barcodes: As barcodes need to include ever increasing amounts of data in ever smaller spaces, they have become more compact and require higher density symbologies. The EAN or UPC barcode is seen on many retail products. One Dimensional Barcodes: Data is encoded in the widths of the bars and the spaces between them, not in their length. The only way to check is to scan the barcode with a barcode reader. NB The Human Readable data may not reflect the data in the barcode. Human Readable data is the same data as represented by the bars and spaces, but printed as text for people to read. The bigger the ratio, the wider the barcode. The Barcode Ratio is the ratio of wide to narrow elements and helps configure the width of the code. A Code 128 barcode has a higher symbology density than a Code 39 barcode. The Barcode Symbology Density is the amount of information a barcode can store. There is a direct correlation between the X Dimension and the size of the Quiet Zone. They must be left clear so the scanner can read the code correctly. The Left & Right Margins or Quiet Zones are areas immediately before and after the code. It dictates the width of all the other bars and spaces, as well as the length of the barcode. The X Dimension is the width of the narrowest bar or space (usually given in mils). This is like an error detector code – the reader performs a calculation based on the two codes and if the answers match then the barcode has been scanned successfully. ![]() Some barcodes include a check digit (or checksum character), which is located on the far right of the image. Here are a few individual barcode letters:Ī barcode reader uses a photo sensor to convert the barcode into an electrical signal, measuring each pattern and translating it back into regular, readable characters that then appear on a computer or portable terminal.īarcodes may be scanned in either direction, so special ‘start’ and ‘end’ characters are used tell the sensor which way the code should be read. How do barcodes work?Ī barcode is just a machine-readable language, with lines and spaces representing letters or numbers. More recently rectangles, dots, hexagons and other geometric patterns (two dimensional or 2D barcodes) became used. The data was originally represented by varying the width and spacing of parallel lines (known as one dimensional or 1D barcodes). Barcodes appear on everything from office furniture and identity badges to parcels, cards and supermarket labels, enabling items to be identified and data to be recorded quickly, accurately and in real time.īarcodes work a bit like an ‘optical Morse code’. Whatever you require, we have rigorous quality control measures in place to ensure barcode definition and readability are consistently high.įind out more about Thermal transfer labels What is a barcode?Ī barcode is a visual representation of data that is readable to machines. We use a range of barcode printing technologies including thermal transfer and laser for variable data, and flexographic for fixed data labels, and can produce all traditional barcode types and codes including QR codes.īarcoded labels can be simple black print on white, or colour-coded for enhanced batch identification. We specialise in the production of pre-printed barcode and variable data labels, from simple retail barcode labels to more complex sequentially numbered or serial number labels. ![]()
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