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To summarise:
Laser light starts with Pulsed Light but eliminates all but one wavelength (or colour)
of light. Laser can deliver only one colour (or wavelength) of light at a time.
Intense Pulsed Light can deliver many colours of light at a time and the spot size is
known as broad band. Pulsed Light machines use ‘cut off’ filters to selectively deliver
the desired wavelengths.
These wavelengths can be customized to reach the specific hair, blood vessels, or skin
component being treated; and can be modified with each pulse.
We know that longer wavelengths (higher nanometres) penetrate deeper into the
skin therefore longer wavelengths are used to treat deeper targets. All the visible
colours can specifically target different chromophores (light absorbing target)
selectively avoiding other tissues. It is important to remember that the shorter the
wavelength, the more topical the treatment target.