View Full Version : UV sensitive pens (invisible ink)
express.items
Sep 3rd, 2007, 11:15 PM
Where can I buy a pen/marker that has UV sensitive ink that is only visible under UV light? Looking to buy locally in GTA... or is there a way I can make invisible ink?
najibs
Sep 3rd, 2007, 11:21 PM
is there a way I can make invisible ink?
Yep, just take a UV light to your bedsheets, and you'll see how.
express.items
Sep 4th, 2007, 12:21 AM
Yep, just take a UV light to your bedsheets, and you'll see how.
LOL.. anything else UV sensitive? In all seriousness... something more readily available.
Jimmerang
Sep 4th, 2007, 02:22 AM
ahaha you guys giving him such a hard time =P
rafiki
Sep 4th, 2007, 02:55 AM
club soda
http://chemistry.about.com/cs/howthingswork/f/blblacklight.htm
express.items
Sep 4th, 2007, 08:20 AM
club soda
http://chemistry.about.com/cs/howthingswork/f/blblacklight.htm
cool thanks, now i need to come up with a way to write with soda :)
techwiz
Sep 4th, 2007, 09:20 AM
I think I've seen some of these pens at the dollar store... not sure how good they are though.
tet8suo
Sep 4th, 2007, 09:29 AM
Yep, just take a UV light to your bedsheets, and you'll see how.
Those liquid are UV sensitive? Never thought of that:cheesygri
express.items
Sep 4th, 2007, 10:28 AM
I think I've seen some of these pens at the dollar store... not sure how good they are though.
I swear I've seen them as well, I should really go look again, I asked my friends and they think I'm crazy for thinking dollar store has it, and I haven't had time to check.
Those liquid are UV sensitive? Never thought of that:cheesygri
Well according to...
club soda
http://chemistry.about.com/cs/howthingswork/f/blblacklight.htm
some detergents are sensitive ;) and some bodily fluids apparently.