In this instructable you will learn how to do fingernail portraiture. One method involves pain and the potential for scarification, while the other pleasure (or mostly the absence of pain). By the end of this instructable I hope you will gain some appreciation for the beard and mustache and their everlasting body slam on the face of history. Or at least look at your fingernails as a place where you can express more than just a color.
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Signing UpStep 1Gather materials
1) A laser cutter
2) A good idea
3) Nail Polish
4) Nail polish remover
5) Press on nails
6) Double sided tape
7) A strong magnet
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Very cool, but could be painful if you miss or overprint.
Better. use an inkjet printer.
Mike
but other than that this is amazing.
Maybe combine it with a camera to get precise measurements.
Really cool idea though. kudos
Really neat instructable, too.
If you're going to do this do it with fake nails, not on your own nails. It's all fun and games until you get a crippling medical condition due to your own stupidity.
i wouldnt know what to suggest... bit of steel maybe? might eff up the machine tho, i have no idea. possibly damp wool (like 100% sheeps wool not cotton wool) which is a fire retardant.. a bit of card might even do the trick
Also, a laser does not have anywhere near the spectrum of the sun, so the likelihood of a frequency-tuned laser even having carcinogenic potential is questionable. Do you have a proof source?
Why is it hard to imagine that skin, after being exposed to high amounts of energy, has a higher probability of developing skin cancer than skin that hasn't been exposed to the same? It's but one of the ways, probably the most common though, that cause skin cancer. Commercial lasers emit wavelengths between 375nm and 1800nm (can't find info on the exact wavelength of the laser I'm using though). Ultraviolet light, which is but one (if the main) culprit of skin cancer, starts at around 400nm.
If you want to be careless with your body by all means go ahead, but advocating carefulness when working with lasers is still the way to go, wouldn't you agree?
As far as I can tell, an engraving laser printer uses a CO2 laser, which operates in the infrared and has minimal penetration capabilities. So your assertion that it would pass through the keratin of a fingernail appears to be *unfounded*, despite its vehemence.
Additionally, the IR output of CO2 lasers is NOT ionizing radiation, so they are (evidently) incapable of damaging DNA in a mutagenic fashion - so they almost certainly do NOT cause cancer. Hence their use in all sorts of soft tissue cancer treatment.
NB - I am not a MD, a physicist, or an engineer. I just did about ten minutes of Google-fu to find this information.
I've heard the old "lasers can cause cancer!" scare on the internet before. At face value it sounds like it could be true, but it only takes a bit of common sense to realize that it's nothing but unsubstantiated fear mongering that gets passed from person to person. Total bunk promoted by people who like to play the role of internet laser safety cop.
Neat instructable. I wouldn't worry about cancer in the slightest bit.
There are also different kinds of laser engravers (not a laser printer, not the same thing), some do indeed use co2 and some uses different materials, such as a YAG or YVO4 laser working at different wavelengths. Fingernails are transparent for heavens sake, it's like saying it wouldn't pass through glass that's a bit cloudy. Granted it's slightly out of focus (since the focus point, if set correctly, is on the nail) and the black takes up some of the brunt of the laser. However, set the strength of the laser a wee bit too high and you cut through the nail like it's butter.
You don't need to damage DNA in a mutagenic fashion for it to have a possibility to lead to skin cancer. Burn wounds in general have a, if still lower than sunburns caused by UVA or UVB rays, possibility to lead to skin cancer as well. If you use laser on your skin that's basically what you have, a burn wound. If you did ten minutes of "google-fu" I'm amazed that you didn't run into that as well.
Do what you want, stick your whole arm into the laser if you want (people have done so before), that doesn't mean it's something to be promoted as a good idea.
MrPumpernickel: CO2 lasers are quite unique in a few ways. Firstly, they operate in the far, far infrared - at 10600nm. No extra zeroes in there, it is really ten thousand. This gives them some unusual properties - many materials which are quite transparent to visible light, like glass, polycarbonate plastic and indeed fingernails, are completely opaque to this wavelength.
Now, as for the idea of damaging DNA in a mutagenic fashion. There are not many lasers available which are deep enough into the harmful UV-B and UV-C regions to do this - as you stated, the lowest we usually see is 375nm and this is only 25nm into the fairly harmless UV-A region.
Yes - you can burn yourself, but there is no evidence to suggest burns lead to cancer.
Oh, and as for your initial statement about many times the power of the sun - well, you're just plain wrong. Although you are sort of right. It all comes down to energy density.
Sunlight on a hot day has an energy density of around 1000w per square metre. This laser cutter has something like a 40w laser in it.
The difference is density. That 40 watts isn't spread out like sunlight, it's all focused down to one tiny, tiny point. This doesn't make it more dangerous than sunlight, however - you can obtain an enormous Fresnel lens from a rear-projection TV with a surface area of over 1 square metre, and focus that whole 1000w down into a tiny tiny point. That can really burn stuff.
Now, one more thing, directed at mr gingerbaker. CO2 lasers are not used in any sort of therapeutic treatment, they are simply not suited to it. Lasers used in skin treatment typically operate within the visible range, and instead of being constantly on (like a CO2 laser) they are pulsed extremely fast, to allow selective heating of one particular target without burning surrounding tissues.
Anything else I haven't cleared up?
I think you are incorrect about CO2 lasers not being used therapeutically, though, see:
http://www.irradia.fi/english-surgical-laser-co2.shtml
http://www.aesthetic.lumenis.com/acupulse
http://www.google.com/#hl=en&biw=1260&bih=641&q=CO2+laser+cancer++use+usage&aq=f&aqi=&aql=&oq=&gs_rfai=&fp=8393b8a6395e836a
did you measure the thickness of your finger and reset it manually with your other hand off screen?
my school has one of these in the tech department
i know where i'll be tomorro
=]
btw great idea