Ynot Posted October 21, 2005 Share Posted October 21, 2005 I know a chemist who said it was a standard gag when finished with Liquid nitrogen was to throw it accross the floor at some on. They'd brick it but (only if you judged it right I assume) it would evapourate well before it got near them.I really do hope that the younger members of the forum are NOT taking notes on any of these wild suggestions wrt LN....! Or at least if they are, they're marking those notes of what NOT to do!!Jeez, it's bad enough trying to educate wannabees about the perils of CO2 dry ice without having students rush out to the chem labs to see if they can swipe some nitrogen to throw about the classroom, "just to see if....." Don't wanna sound like a kiljoy, guys, but come on ......! Link to comment Share on other sites More sharing options...
the kid Posted October 21, 2005 Share Posted October 21, 2005 Unfortunately I cannot find the site I 1st saw them on but what about glow granules, they work like any good glow in the dark product. Although this site seems a little expensive. Like with the UV paint you can pour them in to a tray or such. Link to comment Share on other sites More sharing options...
bruce Posted October 21, 2005 Share Posted October 21, 2005 I know a chemist who said it was a standard gag when finished with Liquid nitrogen was to throw it accross the floor at some on. . Hopefully the emphasis is on the "was" rather than "is"..... A lab technician died - suffocated and frozen - a few years ago following a liquid nitrogen spill in a research lab in Edinburgh. OK, it involved much larger quantities than we are talking about, but there are lessons to be learned from every such incident... Link to comment Share on other sites More sharing options...
Jivemaster Posted October 22, 2005 Share Posted October 22, 2005 Used to be fun when we had liquid nitrogen delivered to the lab by road tanker every week!!! People would see the tanker driver emerging from the cloud of low fog!!!! low being 6ft and rolling while the transfer hose cooled down to -175C. In a ten metre cube - a stage- with ventilation - a proscenium arch- a deilberate spill of say ten litres of liquid nitrogen will be a low hazard way of achieving the desired result Link to comment Share on other sites More sharing options...
robert morley Posted October 22, 2005 Share Posted October 22, 2005 UV pigment dissolved in someat, guessing water will be too thin, wallpaper paste springs to mind something with some gloop. Flints carry UV dry pigment. UV source internal to bucket 4 0r 6" UV tube or some UV LEDs, need the UV to very focused to the gloop. Or GID pigment freshly charged off blacklight source if audience eyes are pre accustomed to dark scene beforehand.Do this mean it was a good idea? Link to comment Share on other sites More sharing options...
Jram Posted October 22, 2005 Share Posted October 22, 2005 In fact there's a trick you can do that involves liquid nitrogen, a surgical glove, a hot-dog sausage and a hammer.... Off topic, but Penn and Teller did something similar in "The Unpleasant World of...", aired in 1997 or so on Channel 4 (still have it on tape!), where they gathered some schoolkids round, to teach them about liquid nitrogen. The froze some squeezy cheese, and then produced a mouse that would eat it. But they accidentally 'dropped' the mouse in the nitrogen, and then when Teller went to retrieve it, Penn forced his hand in, before smashing it with a hammer... And on topic, if there is some appropriate set piece that you can hide a lamp in, your character could place the bucket upside-down over it (as you would if building a sandcastle), then when he removes it, there is a column of light... Link to comment Share on other sites More sharing options...
djw1981 Posted October 22, 2005 Share Posted October 22, 2005 The froze some squeezy cheese, and then produced a mouse that would eat it. But they accidentally 'dropped' the mouse in the nitrogen, and then when Teller went to retrieve it, Penn forced his hand in, before smashing it with a hammer... Technically I think that would be GBH over here, except that in the Penn and Teller case it appears to have been a magic illusion somehow. Link to comment Share on other sites More sharing options...
Jram Posted October 23, 2005 Share Posted October 23, 2005 They didn't hide the 'somehow' after the initial audience reaction - Penn looked at them disdainfully and showed the plaster hand (or its remains). Teller had picked it up moments before and held it just inside his sleeve, his real hand safe behind it. Link to comment Share on other sites More sharing options...
Aran2000 Posted October 23, 2005 Share Posted October 23, 2005 One way that I've achieved similar effects in the past has been using ultrasonic water foggers, such as this or this (if you need even more mist!). In terms of creating a pourable, illuminated fog, these work really well, positioned in a bucket/bowl of water. The only downside is the need for a power cable going to the container, but it might be possible to work around this (possibly by making up a battery pack to replace the AC adaptor). Just a thought anyway. Alex. Link to comment Share on other sites More sharing options...
Mush Posted October 24, 2005 Share Posted October 24, 2005 Do this mean it was a good idea? Yeah I reckon so, seen it used to simulate molten metal and lava flows, need to get a good intensity of blacklight on the area to glow though. Link to comment Share on other sites More sharing options...
robert morley Posted October 24, 2005 Share Posted October 24, 2005 Has the original poster of this thread commented on any of the ideas yet? I have not seen any other posts or comments of the ideas we have given him. Link to comment Share on other sites More sharing options...
Mr.TG Posted November 17, 2005 Author Share Posted November 17, 2005 Thanks everyone, the idea was dropped, and I completely forgot I'd posted on here after that!Some great ideas though. Link to comment Share on other sites More sharing options...
thelxbloke Posted November 17, 2005 Share Posted November 17, 2005 Was there any reason it was cut, or just too complicated? Steve Link to comment Share on other sites More sharing options...
back_ache Posted December 2, 2005 Share Posted December 2, 2005 A lab technician died - suffocated and frozen - a few years ago following a liquid nitrogen spill in a research lab in Edinburgh. OK, it involved much larger quantities than we are talking about, but there are lessons to be learned from every such incident... To further ram the point home, a truck driver died when he entered the back of his nitrogen cooled truck before it finished venting and yes, believe it or not this style of mobile cooling is still in use, but with a single alarmed tensa barrier accross whilst it vents, so that's okay then. Link to comment Share on other sites More sharing options...
zonino Posted December 3, 2005 Share Posted December 3, 2005 I know a chemist who said it was a standard gag when finished with Liquid nitrogen was to throw it accross the floor at some on. . Hopefully the emphasis is on the "was" rather than "is"..... A lab technician died - suffocated and frozen - a few years ago following a liquid nitrogen spill in a research lab in Edinburgh. OK, it involved much larger quantities than we are talking about, but there are lessons to be learned from every such incident... its still quite common to do this, the amount of liquid nitrogen remaining after doing demonstrations of that sort is rather minimal (usually coffee flask sized) the distance isn't really a problem, as long as its not being poured from 10cm above them, by throwing it at them it will all evaporate, you may get a waft of cold air (and I do mean air, its not just N2) but you wont get any liquid nitrogen on you (I've had enough thrown at me in lectures!) Link to comment Share on other sites More sharing options...
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