For many years we have been told a simple public health message: “Wear sunscreen, especially during the summer.” It is well-intentioned advice, but as a physicist I have always found it rather unsatisfying. Nature is rarely that simple, or linear (In fact, in this universe, ‘linear’ is the exception rather than the rule!). If we… Continue reading The physics of sunscreen, SPFs and the energy flow…
Tag: lifestyle
PMU inks – what is in them?
I recently came across an excellent book called “PMUni Colourant Manual” by Jasmine Diebelius which delves into the world of PMU inks and their constituents. In it, she indicates the pigments used to formulate many commonly-used PMU inks. This has proved very interesting to me, because of the ramifications for laser removal. In one section,… Continue reading PMU inks – what is in them?
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