Duct tape specimens

Pictured below is a diffractogram comparing the adhesive side of duct tape from different manufacturers. It is used as part of the material identification in forensic labs as every manufacturer uses a slightly different adhesive and a slightly different upper refractory surface with a different web support structure. An XRD scan of the upper surface, using Rigaku's MiniFlex benchtop diffractometer, combined with a scan of the adhesive side is sufficient to identify the duct tape to a specific manufacturer. Duct tape is one of the most common pieces of evidence left behind at crime scenes.


The fifth generation MiniFlex is a general purpose X-ray diffractometer that can perform qualitative and quantitative analysis of polycrystalline materials. The MiniFlex is available in two variations. Operating at 600 watts (X-ray tube), the MiniFlex 600 is twice as powerful as other benchtop models, enabling faster analysis and improved overall throughput. Running at 300 watts (X-ray tube), the new MiniFlex 300 does not require an external heat exchanger. Each model is engineered to maximize flexibility in a benchtop package. Read more...

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