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Time is not constant – not in our universe
Last post of 2023. If you look at a river, you will quickly realise that the water flows at different speeds depending on where you’re looking. Near the river banks it usually flows quite slowly,...
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My new ‘scribblings’ site
I have put together a new site to gather my various scribblings, blog posts, videos and animations etc, into one place. You can visit it here – https://www.scribblings.info I will add various bits and...
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Another successful MasterClass in Glasgow, Feb 24
Another successful MasterClass, this time in Glasgow. So many ‘light bulb’ moments, according to our attendees. Some came from America (Jim and Lorena), one from Northern Ireland (Natasha – for the...
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Laser Safety Glasses and how to ‘read’ them.
Laser safety glasses must show some information on what they are supposed to protect your eyes against. This must include the wavelength(s) and the protection levels. These are to ensure that your...
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Why is suppliers’ training so dismal?
I was recently asked by a lovely bunch of ladies to train them in the use of their laser, for hair removal. They all had the same device and were all having some difficulties in achieving good...
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New, downloadable booklets
I am currently writing a series of ‘bite-sized’ booklets on various topics including laser/IPL treatments, laser safety, the technologies we use today and variouis other stuff. These will be uploaded...
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The ‘kill-stun-null’ zones in laser/IPL hair removal – why some treatments...
Whilst chatting to a young lady about her laser hair removal issues, I thought of a better way to explain why treatments often don’t work. I realised that we need to visualise the skin as a sequence...
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Why does spot size affect penetration depth?
This is a little tricky because it’s not intuitive. We know, from both clinical tests and computer modelling, that larger spot sizes result in more energy/fluence reaching deeper into the dermis. But...
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Testing the “Neatcell Picosecond Laser Pen” device…
A laser colleague of mine sent me a lovely wee gift – the “Neatcell” pen (thanks Neil!). The company’s web site is here (it’s full of contradictions and discrepancies!!). They claim that this device...
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Comparing laser light with IPL light energy in the skin
I often see comments online claiming things like ‘IPL doesn’t penetrate as deeply as laser’ or ‘IPL is ineffective in treating hair/blood/potatoes/whatever…’ These comments are usually never based on...
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