Comments on: Heart Hand Warmer to use again and again http://www.coolest-gadgets.com/20071217/heart-hand-warmer-to-use-again-and-again/ Playing with cool gadgets in the ongoing search for the Coolest Gadget Mon, 23 Nov 2009 05:02:03 -0500 http://wordpress.org/?v=abc hourly 1 By: Phrogg http://www.coolest-gadgets.com/20071217/heart-hand-warmer-to-use-again-and-again/comment-page-1/#comment-358380 Phrogg Fri, 19 Dec 2008 16:56:57 +0000 http://www.coolest-gadgets.com/20071217/heart-hand-warmer-to-use-again-and-again/#comment-358380 Eh. Maybe they've changed somewhat since i had mine. If you look up toward the top, it's been about ten years since i've used mine. I seem to remember trying to simply soak them in hot water and it not working; i actually had to keep mine at a low boil. Air pressure will also affect boiling points, though...boiling at one elevation might just be really hot water at another. Eh. Maybe they’ve changed somewhat since i had mine.
If you look up toward the top, it’s been about ten years since i’ve used mine. I seem to remember trying to simply soak them in hot water and it not working; i actually had to keep mine at a low boil.

Air pressure will also affect boiling points, though…boiling at one elevation might just be really hot water at another.

]]> By: Ashley http://www.coolest-gadgets.com/20071217/heart-hand-warmer-to-use-again-and-again/comment-page-1/#comment-358379 Ashley Fri, 19 Dec 2008 16:45:37 +0000 http://www.coolest-gadgets.com/20071217/heart-hand-warmer-to-use-again-and-again/#comment-358379 I won't debate with you over this when I know for a fact that simply melting it down in hot water works just fine :3 Seeing as I bought these over a year ago and they're *still* working just fine and they don't re-crystalize after being melted down again. I won’t debate with you over this when I know for a fact that simply melting it down in hot water works just fine :3 Seeing as I bought these over a year ago and they’re *still* working just fine and they don’t re-crystalize after being melted down again.

]]> By: Phrogg http://www.coolest-gadgets.com/20071217/heart-hand-warmer-to-use-again-and-again/comment-page-1/#comment-358251 Phrogg Thu, 18 Dec 2008 09:07:09 +0000 http://www.coolest-gadgets.com/20071217/heart-hand-warmer-to-use-again-and-again/#comment-358251 Mellimaus: Yes, it does need to be boiled for the gel to return to liquid form. The temperature of a bowl of hot water won't be adequate; the sodium acetate requires sustained temperature at above the boiling point of water in order to become stable in a fluid state. Wrap one in a towel, and boil a pot of water. Drop the wrapped warmer in after the water's boiling, and let it boil for 10-15 minutes. Mellimaus:
Yes, it does need to be boiled for the gel to return to liquid form. The temperature of a bowl of hot water won’t be adequate; the sodium acetate requires sustained temperature at above the boiling point of water in order to become stable in a fluid state.
Wrap one in a towel, and boil a pot of water. Drop the wrapped warmer in after the water’s boiling, and let it boil for 10-15 minutes.

]]> By: Mellimaus http://www.coolest-gadgets.com/20071217/heart-hand-warmer-to-use-again-and-again/comment-page-1/#comment-358227 Mellimaus Thu, 18 Dec 2008 00:41:19 +0000 http://www.coolest-gadgets.com/20071217/heart-hand-warmer-to-use-again-and-again/#comment-358227 I just bought some of these, but they won't reset...do you HAVE to put them in boiling water? I just put them in a bowl of hot water...should I do hot water with a towel?... I just bought some of these, but they won’t reset…do you HAVE to put them in boiling water? I just put them in a bowl of hot water…should I do hot water with a towel?…

]]> By: Kitsune http://www.coolest-gadgets.com/20071217/heart-hand-warmer-to-use-again-and-again/comment-page-1/#comment-326263 Kitsune Mon, 14 Jan 2008 13:27:59 +0000 http://www.coolest-gadgets.com/20071217/heart-hand-warmer-to-use-again-and-again/#comment-326263 Suresh- Inside the warmer is concentrated sodium acetate. Snapping the button makes all the little molecules inside (whatever you want to call them) freak out and crystallize by creating a nucleation center. The easiest way to explain it would be to picture a football field of nerds. They're happy, doing their thing, discussing D&D and whatnot. Then throw a jock into the field. Provoke the jock. He turns around and punches a nerd. The rest of the nerds freak out in response to that single nerd being punched and all the nerds falls over. Simple, chemical chain reactions :3 Suresh-

Inside the warmer is concentrated sodium acetate. Snapping the button makes all the little molecules inside (whatever you want to call them) freak out and crystallize by creating a nucleation center.

The easiest way to explain it would be to picture a football field of nerds. They’re happy, doing their thing, discussing D&D and whatnot. Then throw a jock into the field. Provoke the jock. He turns around and punches a nerd. The rest of the nerds freak out in response to that single nerd being punched and all the nerds falls over.

Simple, chemical chain reactions :3

]]> By: Suresh http://www.coolest-gadgets.com/20071217/heart-hand-warmer-to-use-again-and-again/comment-page-1/#comment-326255 Suresh Mon, 14 Jan 2008 09:35:50 +0000 http://www.coolest-gadgets.com/20071217/heart-hand-warmer-to-use-again-and-again/#comment-326255 How does button trigger the chemical reaction? How does button trigger the chemical reaction?

]]> By: Ashley http://www.coolest-gadgets.com/20071217/heart-hand-warmer-to-use-again-and-again/comment-page-1/#comment-324880 Ashley Fri, 28 Dec 2007 00:06:51 +0000 http://www.coolest-gadgets.com/20071217/heart-hand-warmer-to-use-again-and-again/#comment-324880 I recently bought a pair of these from EBay - they're wonderful! Push the little button inside and the sodium acetate inside the button sets off a chemical reaction in the gel that solidifies it and heats it up. Perfect for slipping into your gloves or back pocket. The heat lasts up to an hour and they're easy to re-use again and again. Just stick them in hot water, melt the insides down, and use them again! I highly recommend these! I recently bought a pair of these from EBay – they’re wonderful!

Push the little button inside and the sodium acetate inside the button sets off a chemical reaction in the gel that solidifies it and heats it up. Perfect for slipping into your gloves or back pocket. The heat lasts up to an hour and they’re easy to re-use again and again. Just stick them in hot water, melt the insides down, and use them again! I highly recommend these!

]]> By: Latest Gadget Gallery Matrix » Coolest Gadgets http://www.coolest-gadgets.com/20071217/heart-hand-warmer-to-use-again-and-again/comment-page-1/#comment-323993 Latest Gadget Gallery Matrix » Coolest Gadgets Tue, 18 Dec 2007 13:29:36 +0000 http://www.coolest-gadgets.com/20071217/heart-hand-warmer-to-use-again-and-again/#comment-323993 [...] Heart Hand Warmer to use again and again [...] [...] Heart Hand Warmer to use again and again [...]

]]> By: Phrogg http://www.coolest-gadgets.com/20071217/heart-hand-warmer-to-use-again-and-again/comment-page-1/#comment-323906 Phrogg Mon, 17 Dec 2007 17:05:11 +0000 http://www.coolest-gadgets.com/20071217/heart-hand-warmer-to-use-again-and-again/#comment-323906 Sounds like the ones i used to use about 10 years ago, though the ones i had were colorless, rather than red. Same principle, though. This isn't anything necessarily new, but they work really well and are definitely cool just for the geek-factor of being able to watch a chemical reaction over and over again. Sounds like the ones i used to use about 10 years ago, though the ones i had were colorless, rather than red. Same principle, though. This isn’t anything necessarily new, but they work really well and are definitely cool just for the geek-factor of being able to watch a chemical reaction over and over again.

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