A challenge existed, following the restriction of use of CFC-113, to identify a carrier solvent, which would deliver excellent results in latent fingerprint development on porous surfaces.
Fluids like acetone, petroleum ether and heptane achieve varying results, but all are flammable.
3M™ Novec™ HFE-7100 was identified as an excellent replacement carrier solvent for CFC-113 by three independent forensic laboratories in the UK, France and USA. Their conclusions were as follows:
Novec fluid HFE-7100:
- Produced ridge crispness as good or better than CFC-113 with both Ninhydrin and DFO
- Caused minimal running or smearing in a wide variety of inks and substrates
- Had an excellent safety and environmental profile