The best way to check the quality of your barcodes is to use a barcode verifier or barcode checker. A barcode checker also known as a barcode verifier will look at a number of different factors or parameters. Barcode verifiers will analyze your printed symbols using either a camera or a laser.
A barcode grade is used to determine whether a code will scan easily. The ANSI grades are on an A to F scale.
These factors are graded in 10 individual cross-sections of the code, with the overall grade being a guide to the readability of a symbol.
For example, a code might grade well in 8 of 9 parameters – a B grade. But if one area consistently grades as F, then the overall grade will reflect the worst case parameter of F.
The results for each of the 10 scans is averaged together to arrive at the overall barcode grade, so if 5 scans get A grades and 5 scans get F grades, the overall result will average to a C grade.
Barcode Checker – How They Help You
That is why Webscan verifiers show detailed results for each scan cross-section, allowing you to trace the computation of the final barcode grading back to the individual parameters of each scan.
What should I do if my codes receive failing grades?
When verification software reports that the symbol failed, the user can view a full detailed report. Each of the 10 individual scans results will be displayed and graded on each parameter. From here you can analyze on which parameters the barcode failed, and how to fix the problem for subsequent print runs.
Refer to ANSI/ISO Quality Parameters for a complete understanding of the cause of low grades for each parameter. Based on the particular parameter that caused the failure, you can adjust your production process to improve that characteristic of the code. For more information please visit our FAQ page.
Barcode Grade Factors –Width, Bleed, etc.
The parameters that a barcode checker measures depend upon the symbology. For example, verifiers for 1D linear barcodes should test nine quality parameters according to ISO/ANSI specification. These are:
1) Edge Determination
2) Minimum Reflectance
3) Symbol Contrast
4) Minimum Edge Contrast
8 ) Decodability
9) Quiet Zone
For multi-row stacked barcode grading, the process is similar and the parameters are the same, except that these parameters will be measured on each row of the symbol. Furthermore, if the stacked symbol contains error correction (for example PDF 417 but not GS1 DataBar) then Unused Error Correction will be included.
For 2D matrix symbols, several barcode grade parameters are different. These are:
1) Unused Error Correction
2) Fixed (Finder) Pattern Damage
3) Grid Non-Uniformity
4) Axial Non-Uniformity
The barcode grader parameters for symbol contrast and modulation are similar to the same parameters for 1D linear codes, except that the computation of the modulation grade is different in that it takes into account the availability of error correction in the 2D symbol.