Mr. Nachtrieb has 30+ years of hands-on experience in barcode technology. His team imaged the film master for the first commercially scanned barcode in North America (1974). His specialty is barcode quality. He created and hosts a highly customized barcode quality seminar which has been presented to 100's of companies, reaching thousands of quality-concerned people, helping them to avoid barcode problems and manage barcode-related risk.

Barcode Quality: What’s the Problem?

Barcode quality has been the primary topic of discussion these past months. It’s important to may industries in a  wide variety of applications. What about you out there in the trenches? Barcode quality problems: What’s your Experience? Barcode quality is a multi-step procedure. For example, in the retail channel every step in the process, from getting the GTIN number…

Modulation and Decodability

Modulation and decodability are easy to understand if you are familiar with the Scan Reflectance Profile or SRP. This is discussed in previous articles in this blog. The Scan Reflectance Profile is a powerful diagnostic tool for gauging what is going on with a barcode symbol. The SRP makes it easier to talk about reflectivity attributes…

Edges: Bar and Space Transitions

As we’ve said before, barcode scanners work based on reflectivity and contrast. The messages encoded in linear barcodes are decoded on the basis of the scanner’s ability to detect reflective and contrast differences. In a pattern of lines and spaces, these critical differences are demarked by the edges—the places where the bar ends and the…

Minimum Reflectance and Symbol Contrast

Minimum Reflectance and Symbol Contrast are tested by taking reflectance readings from the symbol—specifically the maximum reflectance value and the minimum reflectance value, and applying a calculation to those values. Minimum Reflectance is a Pass/Fail parameter A barcode image must have a minimum amount of reflective difference between the barcode and the background for the…

ANSI Specification for Linear Barcode Quality

The ANSI specification for the quality—and therefore the performance—of linear barcodes tests and grades 9 parameters. Whether or not you believe that ISO or ANSI are legitimate and meaningful as a quality benchmark, the ANSI specification is the basis for defining barcode acceptability. The ANSI specification for the quality of linear barcodes tests and grades…

Honeywell Verifier Retirement: What Does It Mean?

On June 9, 2011 Honeywell Scanning and Mobility released PRN #11-06, announcing the retirement of their entire line of barcode verifiers. Previously they had retired a substantial portion of their verifier line—in particular most of the wand-based devices. Honeywell verifier retirement comes as no surprize after several years of non-commitment to this industry Several years earlier,…