As a general guide the following should be checked to avoid common barcode problems:
- Correct calculation of Check Digit Calculator
- Sizes of Quiet Zones of the symbols (the white spaces to the left and right of each barcode)
- Sufficient contrast between bars and spaces (background)
- Correct colour choice for bars and spaces
- Barcode construction
- Size of symbols, respecting the application characteristics and recommendations of the GS1 General Specifications
- Barcode height - any reduction of bar height impairs reading efficiency
- Packaging - wrapping preventing the access of the light beam of the scanner (package welding, printed borders; etc)
- Deteriorated code (flecks, blots, wrinkling, etc.)
- Inadequate symbol positioning (mainly on cylindrical packaging)
The correct position for the barcode will depend on the symbol type, and the processes involved in the product’s packaging, distribution, storage and
handling.
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