Barcode Verification

Barcode Verification is a complex and highly technical field. There are numerous ISO (and other) standards governing barcode print quality, symbologies and structures. There are also many different industry standards such as GS1 and regional requirements such as French CIP. The complex nature of the subject and the many different bodies involved can be very confusing and may lead to incorrectly labelled product being shipped, causing product returns, fines or customer complaints.

Quality Checking

Whatever the method of generating and reproducing a bar code image there is always a danger that the bar code will not scan correctly. Bar code standards vary in their recommendations for controlling symbol quality.

For controlling dimensional tolerances, some standards recommend the use of a printability gauge which consists of a number of blocks containing a series of parallel bars. Each contains bar spaced at a different pitch from each other.

The user obtains a film of the printability gauge which is then reproduced on to a printing plate. When the gauge is printed the user looks for the block with the finest bars that has not filled in. This then indicates which symbology magnifications may be printed safely.

Barcode Quality  The Printability Gauge
Many users also use a scanning device known as a “verifier” which performs a quality check on the bar code image.
These devices range in price form those costing a few hundred dollars to those in excess of $30,000 and the facilities vary accordingly.
At the top of the range a verifier will measure each bar and space individually record the contrast, confirm the check digit, magnification and symbology and provide a hard-copy for keeping on file or sending to the customer as proof of quality. It will read from positive or negative film as well as bromide.


At the opposite end of the scale, simple devices will only check that the symbol reads and will not give an indication of quality. Care should be taken in the choice of any quality checking device. Particularly that the spectral range of the light source used in the device is compatible with that specified by the symbology specifications.

Unfortunately, the only true guarantee of a bar codes quality is for it to read on the stores scanner. However, printed tolerances of bar codes are set at a level which allows a good safety margin between the printed tolerances and the point at which a code will not consistently decode correctly through the supermarket scanner.

DataMatrix (2D) barcode verify

Standards.Data Matrix was invented by International Data Matrix, Inc. (ID Matrix) which was merged into RVSI/Acuity CiMatrix, who were acquired by Siemens AG in October, 2005 and Ack123 AG in September 2008. Data Matrix is covered today by several ISO/IEC standards and is in the public domain for many applications, which means it can be used free …

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QR code Bar code Verify

QR code found in Japan, and used in world. in mobile phone application, it is the most important type of bar code.This page talks about general information of the 2D barcode, QR Code (ISO/IEC 18004:2006). QR Code Overview QR Code is a matrix barcode (or two-dimensional code), readable by QR scanners, mobile phones with a …

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HCCB Barcode(3D barcode) verify

Microsoft Tag is a color bar code. is a new type of barcode, have 3 dimension. it looks going popular on mobile phone. High Capacity Color Barcode (HCCB) is the name coined by Microsoft for its technology of encoding data in a 2D “barcode” using clusters of colored triangles instead of the square pixels traditionally …

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MaxiCode(2D) barcode verify

MaxiCode is an important member of barcode family. MaxiCode is a public domain, machine-readable symbol system originally created and used byUnited Parcel Service. Suitable for tracking and managing the shipment of packages, it resembles abarcode, but uses dots arranged in a hexagonal grid instead of bars. MaxiCode has been standardised under ISO/IEC 16023. A MaxiCode symbol (internally called “Bird’s Eye“, “Target“, or “ups code“) …

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Quality control and verification

Barcode verification examines scanability and the quality of the barcode in comparison to industry standards and specifications. Barcode verifiers are primarily used by businesses that print and use barcodes. Any trading partner in the supply chain can test barcode quality. It is important to verify a barcode to ensure that any reader in the supply chain can successfully …

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