Technology guide
Multi-wavelength laser: spectral synergy
Combining 755, 808, 940 and 1064 nm in a single device makes it possible to adapt hair removal to every hair and every skin. The principle and how to use it.
Definition
A multi-wavelength laser brings several sources together in a single platform, typically 755, 808, 940 and 1064 nm. Each wavelength has its own qualities, which are combined according to the client.
What each wavelength contributes
755 nm: high absorption by melanin, ideal for fine hair and fair skin. 808 nm: the most versatile. 940 nm: greater depth, greater safety on olive skin. 1064 nm: the deepest and the least absorbed by the epidermis, reserved for dark skin and deep-seated hair.
Why combine them
A single area contains hairs of different thicknesses and depths. Combining wavelengths makes it possible to reach them all in one session and to adapt better to the skin type, instead of settling on a single compromise.
Examples of combinations
Fine or light hair: 755 + 808 nm. Dark hair on fair skin: 808 nm, supplemented by 1064 nm. Olive skin (IV-V): 808 + 940 nm. Very dark skin (VI): 940 + 1064 nm, with low energy and long pulses.
Good practice
A prior patch test on a small area, cautious settings at the start, monitoring cumulative heat: several shots in quick succession heat the skin more. More comprehensive training is needed to master all the combinations.