The method for hardening electro-insulating materials is characterised by the
utilization and/or co-utilization of near-infrared radiation (NIR) having a wavelength
of 500 nm to 1400 nm. NIR also enables very fast hardening of the component surface
even with pure thermally hardenable impregnating material and further provides
good hardening of thick layers located deep inside said layers. Combined hardening,
for example, NIR and UV light, is also possible.