SWCNH are produced by Carbonium Srl by a high-yield proprietary process based on rapid condensation of carbon atoms (C₂ and C₃) without any catalyst. Carbon dimers and trimers are obtained by direct vaporization of graphite. Massive productions of high purity grade SWCNH are now possible without any graphitic or metallic impurities.

Typical values 

*as prepared, no graphitic impurities

**mild oxidising treatment in air increases the active surface up to 1400 - 1600 m²/g;