SPL stands for Square Pulsed Light – it’s from the same family of devices as IPL or Intense Pulsed Light, but an SPL pulse lasts a fraction of a second longer, and the light wavelength isn’t as intense, meaning it does the same job but your skin is less likely to be overheated.
These hand-held devices work by sending a pulse of light straight into hundreds of your hair follicles all at once. This particular wavelength of light specifically targets the pigment melanin. It passes through the rest of your skin without a problem.
When the SPL light hits the base of the hair, which is usually where the highest concentration of melanin is located, it is concentrated and turns into heat. The heat radiates around the base of the hair, and kills off the cells that produce the hair strand, leaving it to fall out over the next few weeks, without a successor. All this happens in an instant. You’ll feel a hot, prickling sensation for a moment after the therapist’s SPL applicator pulses and then it will begin to fade.
Because of the way the SPL light targets melanin, you’ll need to have no sun exposure for 2 weeks prior to undergoing treatment, otherwise the melanin in your skin will absorb the light and the heat won’t be concentrated in the hair follicle. You’ll also need a minimum of 6 treatments. This is because each of the hairs on your body goes through three stages in its lifecycle, and you can only neutralise a hair in the active phase. At any one time only a maximum of 20% of the hairs on your body are in that phase, which is why you need at least 6 treatments.
Once you’ve completed the treatment cycle you can look forward to a lifetime of smooth skin with only an occasional maintenance treatment. Compare that to the cost and hassle of a lifetime of waxing. Best Regards