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Meatball

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i believe that chipdouglas and diachi are correct about ionization. 405nm light is technically just violet light since UV begins < 400nm range. But then again most PHR diodes have a wavelength tolerance of almost 10. So some diodes could actually be putting about 395-396nm-still not short enough to mess with DNA.
 

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one way or another their was going to be a hole might as well save some doe.

I did smell very bad w/ all that burning flesh...

Think what the Dr. will say when I tell him I cut it out w/ lazer...:0
 

Cyparagon

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It is not done one hair at a time. The effect area per pulse is ~1cm². It can however require many treatments of the same area as not all follicles are in the anogen phase (most susceptible to damage) at any given time.
 

lasersbee

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Keep telling yourself that and you'll end up like this guy http://www.theonion.com/content/video/courageous_man_refuses_to_believe :D

Seriously, don't try to remove your girlfriends moustache with a laser, you can give her some nasty burns and scars.
ROFL.... I thought that Video was real at the start...:crackup::crackup::crackup:...LMFAO...
Got me....:crackup:

Yeah T_J... Should test it on rats first...
If you can produce (using your Laser Epilation technique) a couple of completely bald
rats that don't die with in a year of cancer... I'd go for it....:D J/K

Jerry
 
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This is pretty interesting (the BR cancer thing). I don't know much about this stuff, but I read Wikipedia and WHO articles and concluded that (correct me if I'm wrong here) the wavelength of a laser is the sole factor which determines if it is ionizing or not.

Now anything in the short end of the spectrum (GAMMA, XRAY, UV) is ionizing... apparently UV is anything from 10nm to 400nm.... now if diodes can (as was said) put out +-10nm, then why couldn't a BR putting out 395nm be damaging?

UV by definition is not visible, so I suppose if a BR diode decided to put out 395nm you wouldn't see anything... but hypothetically if someone was exposed to this non stop for a year say... is there any fundamental reason why it couldn't cause DNA mutation?
 
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Switch

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so I suppose if a BR diode decided to put out 395nm you wouldn't see anything..
That is false. The limit between violet and UV isn't crystal clear so they just drew the line at 400nm which is visible by most humans.Actually most people can still see 360nm pretty well.

As the wavelength gets shorter the light gets dimmer, but there isn't any solid boundry where your eye just ceases to react to it.

And as was said before, different elements get ionized by different wavelengths, and your tissue is made of more types of atoms bound together in various structures to say the least.Now unless you thoroughly test it by exposing yourself and others on different body areas with a blu-ray, or really know your stuff , you can't say for sure that a blu-ray won't give you cancer.

Even green and red lasers have various effects on skin cells at different power densities and in different skin layers.They may also stimulate growth of certain types of bacteria and actually favor infections.But if you're gonna be cheap with your health you might as well use plastic film 3D glasses for laser protection too :/
 

dr-ebert

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The lowest ionisation energy is about 3.9eV which corresponds to about 315nm, so longer wavelengths can't be ionising. However, radiation doesn't need to be ionising to be harmful. Light of any wavelength can cause chemical changes which may be damaging. Generally, the shorter the wavelength, the greater the number of reactions that can be triggered, and the greater the potential for damage.
 

Asherz

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Ah onion videos are so great, I rememeber there was one on there about a mac wheel and I actually believed for a week :( lol
 




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