06-15-2012, 03:43 PM | #1 (permalink) |
Join Date: Jun 15 2012
Posts: 3
Rep Power: 0 | Optimized tanning wavelength? First three background points, then my proposal: 1. We know that light in the UVA range causes tanning, or turns pink melanin brown. I've read varying descriptions, including that there are different kinds of melanin. 2. We also heard that UVA radiation can gradually age skin, though this is more of a problem with prolonged exposure, rather than planned exposure during tanning. 3. The medical industry found that even though vitamin D production peaks at 297 nm, and disappears by 315 nm, 297 nm is far from optimal because of the burning the occurs, as well as the destruction of recently produced vitamin D. They found that the ratio of vitamin D production to burning/destruction is var better around 307-312 nm, and have had great medical results in this range. OK, so here is my proposal: Why don't we know exactly which frequencies in the UVA range cause each amount of tanning and aging, and then find the frequency that provides the best ratio of tanning to aging? Even if tanning is low at that frequency, we can just up the intensity since the ratio is good. We can then use 95% that frequency, and 5% around 309 nm, and stay within existing FDA regulations. If people felt less dried out in our beds than others, and got tanned faster with fewer burns, and got more vitamin D, they would come back on there own, to the good stuff. I've searched for information on the best frequencies, but I've found very little. Testing for aging frequencies is not easy, but probably is worse at shorter wavelengths, and probably can be predicted by the UV absorption spectrums of DNA and collagen, which are published. The tanning speed and quality at various wavelengths is not published, from what I can tell, but it would be very easy for us to test on our own if we have the right filters. We could graft the time needed to get a tan vs frequency and intensity. Compare those measured values to the published data for DNA and collage, and get a pretty good idea of the optimal frequency. Sound good? Or is it better to just stay with broad spectrum? |
06-26-2012, 01:37 PM | #2 (permalink) |
Join Date: Apr 14 2012 Location: Clifton, New Jersey
Posts: 14
Rep Power: 0 | Re: Optimized tanning wavelength? Something like this, but even better, is coming. See this ... www.collatan.com I have tested the first generation of that tube, however, it did not give enough UVB to give enough vitamin-D. Now I am waiting for the new and modified version. Actually the pigmentation of melanin continues into the visible violet spectra, and I suppose that will be easier to "sell". Here is an image of the roles of UVA and UVB Last edited by TanRights; 06-26-2012 at 01:39 PM. Reason: image not shown |
06-26-2012, 02:16 PM | #3 (permalink) |
Lamp Geek Join Date: Dec 21 2001 Location: Cleveland, Ohio
Posts: 1,913
Rep Power: 23 | Re: Optimized tanning wavelength? Look up the LSI Sol Glass Lamp. Perfect for Vitamin D production, as the UVB is shifted left in the spectrum. (Between 280-300nm) It also minimizes the UVAČ which causes photo-aging. (Between 310-350nm) Then is has a major peak of energy 365nm which is UVAč, most effective in oxidizing melanin. http://youtu.be/sHDPDLWPGe8
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