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Keep in mind that this technique doesn’t actually cause the hand warmer to produce more heat-there’s a finite and specific amount of potential energy contained in a hand warmer that can’t be increased. Even a small hole can let in sufficient oxygen to keep the reaction going and render your hand warmer cooked. Our air-activated Grabber Hand Warmers keep hands and fingers toasty for up to 10 hours No shaking or kneading is required just open the package and put the 'Original' Warmers in your glove or pocket for a few minutes to start the process. I recommend using thicker, more durable freezer zip-lock bags for this purpose, especially if you’ll be stuffing it in your backpack when not in use.
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#Grabber hand warmers ingredients zip
(To minimize the amount of oxygen in the bag, zip it nearly closed, suck out the remaining air with your mouth, and then quickly seal it shut.) Grabber Hand Warmer Maximum Temperature: 158 F (70 C) Ingredients: Iron, water, cellulose, activated carbon and salt Country of Origin: USA Harmonized. Once the small amount of residual oxygen in the zip-lock is used up, the hand warmer is essentially put on pause until you re-expose it to the air. And to cut off the oxygen, all you need to do is put the hand warmer in an air-tight zip-lock bag. If you cut off the supply, the chemical reaction ceases. Non-toxic, all natural ingredients that are non-combustible. Small enough to fit inside a pocket or glove, pad measures only 2' x 3'. Open the package and the heat pad immediately reacts to the outside air to provide several hours of heat. In order for the reaction to occur, the hand warmer needs a supply of oxygen. Grabber Hand Warmers are the best choice for a cost-effective, disposable heat source. After all the iron has reacted, the hand warmer is done and ready for the trash.Īnd therein lies the crucial piece of information. Once exposed to air, the iron oxidizes and releases heat in the process. Most disposable hand warmers contain a mix of iron, water, activated carbon, vermiculite, cellulose, and salt. Most disposable hand warmers provide several hours of quality heat, but what if you only need warmth for a limited time? Don’t waste perfectly good heat by throwing out a hand warmer after only a short use! Save it for when you need it with this über-simple technique.įirst, some basics.