Welsmann iD. Identification Systems and Quality - Your partner in checking of barcodes according to relevant international ISO standards.

In our barcode check center we analyse your barcodes and matrixcodes

Why barcode check ? More and more retail chains and producers are demanding certain quality features of printed barcodes and matrix codes. Some users complain about the readability of the codes without knowing the reason for the bad reading.

If faulty barcodes or matrix codes are only noticed during use, the use of these codes can be severely impaired and the sense of error-free automatic data acquisition cannot be ensured. The employees then have to enter the data manually, whereby input errors are possible. These problems can be avoided by a random check of the barcodes and matrix codes to be used in advance.

Barcode readers (scanners, smartphones) are not Barcode Verifer. At first glance, testers and readers for bar codes and matrix codes appear to be similar. However, a tester should provide a test result for the codes that allows an objective quality statement to be made about the properties of a tested code. The code properties such as the module size, contrast properties, printing accuracy properties (such as the width of the lines and gaps and the matrix size) and possible logical errors are evaluated. In order to be able to determine these evaluations, measuring distances, sensor angles and illumination angles must always remain constant. Any change to these measurement conditions changes the test results. A reader, on the other hand, should read the code under conditions that are as variable as possible in terms of distance and angle. This describes the reading capability of a code (a wrong reading is also a reading), but contradicts the requirements for a test device.

Our professional service – barcode check

We would be happy to check your barcodes and matrix codes for you for a small Processing fee. This also applies to the special features of the barcodes according to the EAN 128 / GS1 128 standard and the GS1 DataMatrx. Here not only the print quality has to be considered, but also the correct structure of the entire symbol; i.e. the internal structure of the special code type (data identifier and data elements).

We test the following barcode types for you according to all internationally valid ISO standards, ANSI and GS1 specifications: GTIN/EAN, Code 39 (PZN), Code 2 of 5 Interleaved, Code 128, Code EAN 128 / GS1 128, Codabar, Monarch, Pharmacodes, GS1 DataMatrix, DataMatrix, QR-Code and others.

You have the possibility to send us your printed barcodes and matrix codes. With the test system REA PC-Scan/LD3 and the REA VeriCube these are tested against a small processing fee and evaluated by us. This evaluation is very important because it gives you exact information about what may have to be changed in your barcodes or matrix codes. This may be necessary for design, prepress, printing itself and for the packer himself.

Within one to two working days you will receive a qualified test report from us by e-mail. If the barcode or matrix code was not printed correctly or not well by the assembly, you will receive a detailed indication of what needs to be changed with our cover letter. The test report is available in German, English, French, Spanish, Hungarian, Polish and other languages on request.

We are able to check the following barcode and matrixcodes symbologies for you:

  • EAN-8 and EAN-13
  • UPC-A and UPC-E
  • Code 128
  • Code EAN 128
  • Code 2/5 Interleaved and ITF
  • Code 39 and PZN ( Pharma-Central-Number)
  • and further codes on demand.
  • Matrixcodes, DataMatrix, GS1 DataMatrix, QR Code etc.

Our verifiers provide two different evaluations for EAN Codes / GTIN Codes:

  1. ISO/IEC 15420 which includes bar by bar measurements, quiet-zones, print contrast symbol, light margin infringements and check character errors;
  2. ISO / IEC 15416 which includes decode, symbol contrast, edge contrast, modulation, Rmin/Rmax, defects and decodability .

The ISO/IEC 15420 evaluation is good or failed. The ISO / IEC 15416 evaluation is:

ANSI A and CEN 4very good
ANSI B and CEN 3good
ANSI C and CEN 2satisfying
ANSI D and CEN 1not satisfying
ANSI F and CEN 0failed

Table 1: Quality Classification in ISO / IEC 15416

ClassificationRmin*Symbol ContrastECmin*ModulationDefectsDecodability
A = 4≤ 0.5 Rmax≥ 70 %≥ 15 %≥ 0.70≤ 0.15≥ 0.62
B = 3 ≥ 55 % ≥ 0.60≤ 0.20≥ 0.50
C = 2 ≥ 40 % ≥ 0.50≤ 0.25≥ 0.37
D = 1 ≥ 20 % ≥ 0.40≤ 0.30≥ 0.25
F = 0> 0.5 Rmax< 20 %< 15 %< 0.40> 0.30< 0.25

*EC = Edgecontrast; R = Reflexion

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