AIM Technologies

fpNATURAL 1, 2

A non-toxic and safe-to-use IR fluorescent fingerprint powders

Despite the vast quantity of fingerprint treatments currently available, examiners continue to be frustrated by a number of ‘difficult’ substrates. Multi-coloured and densely patterned backgrounds, reflective metal surfaces and substrates that fluoresce at the same wavelengths as common fingerprint treatments, can prevent the successful imaging of fingerprints. However, when dusted with fpNatural 1 IR fluorescent powder, interference can be removed to reveal high contrast prints.

Plants absorb visible light as ‘food’ reflecting back all IR light that cannot be absorbed. Under intense illumination, pigments found in plant tissues, namely chlorophyll and anthocyanin, emit strong Near Infrared fluorescence. Using these facts as our starting point we began testing plant-based powders for suitability. Excellent results were achieved using a modified blend of cyanophyta, a phylum of bacteria that gains its name through its blue/green colour. Often referred to as blue-green algae, there are approximately 2000 species of cyanophyta, the perfect blend of which meets all the requirements to produce an ideal IR fingerprint powder

Benefits of a plant based fingerprint treatments:

  • Rich in IR fluorescent phycocyanin and chlorophyll
  • Non-toxic, safe to use and handle
  • Once modified can be easily applied with a zephyr brush
  • Excellent results on many ‘difficult’ backgrounds