De-mystifying the physics jargon behind light-based treatments

The world of lasers and IPL systems is full of physics terms and expressions. Many of these are quite daunting to non-physicists and we tend to forget that not everyone is a nerd!! So, here’s a breakdown of some of those terms…. You can download a pdf version of this post here. Wavelength – colour… Continue reading De-mystifying the physics jargon behind light-based treatments

The Fitzpatrick Skin Scale – What is wrong with this idea???

First things first – the melanin concentration (skin colour) is not related to the Fitzpatrick Scale… The ‘Fitzpatrick Skin Scale’ was designed by a Californian dermatologist, Dr Thomas B. Fitzpatrick in 1975. He was routinely treating patients with potential skin cancers and wanted a way of classifying their potential for developing cancer and subsequent treatments.… Continue reading The Fitzpatrick Skin Scale – What is wrong with this idea???

My concerns in today’s aesthetic industry…

I have been around since before the invention of colour…..!!! I have seen many excellent advances in the medical/aesthetic laser industry in that time. But I have also seen a few things which concern me greatly. Poor training I seem to be training more and more people who have already received ‘training’ on their lasers… Continue reading My concerns in today’s aesthetic industry…

How long does tissue take to be damaged by heat?

I often read about human tissue ‘denaturing’ or ‘coagulating’ at some temperature – usually 60 or 70°C. However, these claims are inaccurate. They rarely state the time over which the denaturation process occurs. Denaturation is when the proteins in cells or tissues ‘unravel’. For example, collagen is made up of three amino acid chains, intertwined… Continue reading How long does tissue take to be damaged by heat?

Which is better – laser or IPL hair removal?

I am asked this question all the time.. There is a lot of mis-understanding about the differences between lasers and IPLs, and how they interact with the skin. Some people think that lasers are “superior”, but this depends on what you’re targeting! I put together a wee animation (below) to try to explain some of… Continue reading Which is better – laser or IPL hair removal?

The physical processes behind laser tattoo removal – what is really going on?

I presented a video to the British Medical Laser Association conference in May 2021, discussing my work on the physical processes which may be occurring during laser tattoo removal. In it, I discuss the formation of steam bubbles, how they evolve over time, the latent heat energy of vaporisation and condensation, and the cyclic bubble… Continue reading The physical processes behind laser tattoo removal – what is really going on?