“Enter QQC’s laser-assisted plasma process, which is done in open atmosphere. Although it is a high-temperature process, the laser energy is closely focused at the point where the diamond is being created and bonded to the surface so that only a tiny volume of the substrate is heated. And it is so rapid, according to Mistry, that hardened and tempered HSS toold are coated with less than a 2-point drop in Rc hardness – well within the normally accepted hardness range for HSS cutting tools.”