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Step 7The invisible costume...
OK, remember in Step 2 where I said to make sure you had something to take the UV pen back off your face?
Guess who forgot?
Fortunately, I remembered just after I drew on my hand (checking for sensitivity) but before I drew anything on my face.
Security pens are solvent-based, so they need more than plain soap and water to remove them. Oddly, baby-wipes are ideal, but it's quite a while since we had nappy-changing in the family, so we didn't have any wipes handy.
You may not want to use a security pen, and prefer instead to use proper UV make-up. This requires two layers of make-up (a base-layer that matches your own skin-tone and the UV layer on top), but can be very effective if you are planning a Hallowe'en costume. You could draw a skull or cadaver face that you flash at unsuspecting passer-bys as you walk from house to house.
Anyway, there you go. Enjoy.
Since making this hat, I have come across a UV Body Pen that would be perfect.
Going back over this project, I think the one thing I would change is the hat - a wider-brimmed hat (such as a panama or ten-gallon hat) would have allowed me to space the LEDs out more efficiently. Still, live and learn.
Guess who forgot?
Fortunately, I remembered just after I drew on my hand (checking for sensitivity) but before I drew anything on my face.
Security pens are solvent-based, so they need more than plain soap and water to remove them. Oddly, baby-wipes are ideal, but it's quite a while since we had nappy-changing in the family, so we didn't have any wipes handy.
You may not want to use a security pen, and prefer instead to use proper UV make-up. This requires two layers of make-up (a base-layer that matches your own skin-tone and the UV layer on top), but can be very effective if you are planning a Hallowe'en costume. You could draw a skull or cadaver face that you flash at unsuspecting passer-bys as you walk from house to house.
Anyway, there you go. Enjoy.
Since making this hat, I have come across a UV Body Pen that would be perfect.
Going back over this project, I think the one thing I would change is the hat - a wider-brimmed hat (such as a panama or ten-gallon hat) would have allowed me to space the LEDs out more efficiently. Still, live and learn.
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The nearest any LED manufacturer will give to a health warning is the following comment with high-lux LEDs (and the UV LEDs I have used are not high-lux, having an output of around 1% of "ultrabright" LEDs):
Currently, the LED industry has no universally agreed upon standard to cover eye safety issues associated with the use of LED products.
(Other posters don't seem to think they are so hazardous, either.)