These days we use a wide variety of lasers and IPLs to treat various targets in the skin. Two major targets are hair and blood vessels. But how much of the laser/IPL light is actually absorbed by these targets? Using data from two very clever scientists (Steve Jacques and Scott Prahl) it is relatively easy… Continue reading How strongly are different laser wavelengths absorbed in melanin and blood?
Tag: Laser/IPL
The world’s FIRST ever commercial laser tattoo patient…
The other day I was training some very nice ladies and showed them a couple of photos of a tattoo I had treated with a Q-switched ruby laser. I realised, as I was talking to them, that this tattoo was the very first tattoo to be treated in our new, commercial clinic. Prior to this… Continue reading The world’s FIRST ever commercial laser tattoo patient…
The ‘best’ way to cool the skin during laser/IPL treatments
Many laser and IPL treatments require a significant temperature rise in the target cells, to effectively kill them. We use light energy to induce this temperature rise. But, calculations show that, in some cases, less than 1% of the light energy is actually doing the job we want. That means that more than 99% of… Continue reading The ‘best’ way to cool the skin during laser/IPL treatments
“I’ve burnt my patient!!” With IPL treatments, that is precisely what we are tying to do…
I often hear laser/IPL operators saying that they “don’t want to burn their patients/clients.” They are wrong!! They DO want to ‘burn’ them, but in a very controlled manner… Every photothermal treatment (the removal of hair, blood vessels, benign pigmentation etc) requires delivering light energy to generate a thermal (heat) response in the tissues. We… Continue reading “I’ve burnt my patient!!” With IPL treatments, that is precisely what we are tying to do…
How strongly do blood and melanin absorb light energy and how does this affect laser/IPL treatments?
WARNING – This post is a bit more scientific than my usual stuff. BUT, it is worth persevering because you will (hopefully) understand more about your laser/IPL treatments, if you do… When we fire light energy at the skin, to treat hair, blood vessel, pigmentation etc, we know that some of the energy is absorbed… Continue reading How strongly do blood and melanin absorb light energy and how does this affect laser/IPL treatments?
Thick and thin hair – how much light energy do they actually absorb during photothermal treatments?
How thick is a hair? Well, according to some research by physicist, Brian Ley (they do all the best research!!!), it ranges between 17 and 181 microns in diameter (see his results here). That is between 0.017 and 0.18 mm. So, that means that their cross-sectional areas [A = pi x (radius)2] are between 0.0000023 and 0.00026 square… Continue reading Thick and thin hair – how much light energy do they actually absorb during photothermal treatments?
“I’m scared to use my laser/IPL.” Why?
I’ve heard this comment many times from laser/IPL users, through the years. It is perfectly understandable – most people don’t want to hurt or injure their clients. For all sorts of reasons… In particular, they are scared of “burning” their clients. They are scared that they might not use their equipment correctly or use the… Continue reading “I’m scared to use my laser/IPL.” Why?
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?
Our eBook Chapters
Listed here are the chapters of our eBook which are available (or will be soon). Click on the links below: Chapter 1 – An Introduction to Laser/IPL Systems and their Applications in Skin Chapter 2 – An Introduction to Laser Tattoo Removal Chapter 3 – An Introduction to Laser/IPL Hair Removal (by mid ’22) Chapter… Continue reading Our eBook Chapters
Carbon Facial treatment with a QS Nd:YAG laser
Recently I tried the new ‘carbon facial’ treatment using the 1064nm wavelength of the Q-switched Nd:YAG laser. My wife was keen to try it! I painted a little black carbon ink solution (which I made myself) onto my wife’s face. After about 20 minutes, or so, to allow it to dry, I applied the laser… Continue reading Carbon Facial treatment with a QS Nd:YAG laser
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