Australian researchers identify 3D-printed gun filaments using infrared spectroscopy

A team at Curtin University in Australia has demonstrated a novel technique for identifying the specific type of filament used in the manufacturing of 3D-printed firearms. The research, published in the journal *Forensic Chemistry*, leverages infrared spectroscopy to analyze the material composition of the plastic.

This method works by examining the unique molecular structure of different plastic filaments, which absorb and reflect infrared light in distinct patterns. These patterns act as a 'fingerprint' for each material. The researchers successfully identified over 60 different types of filaments used in 3D printing with high accuracy using this technique.

The ability to trace a 3D-printed firearm back to its original filament material could have significant implications for law enforcement and forensic investigations. By identifying the specific filament, investigators may be able to narrow down the potential sources or manufacturers of illegal 3D-printed weapons.

This advancement adds a new layer of forensic capability in the ongoing challenge of regulating and tracking the proliferation of 3D-printed firearms. The technique is non-destructive, meaning the filament sample is not damaged during the analysis, allowing for further examination if needed.