Reusable hand warmers produce heat on demand, and are generally contained within metal objects, or small packets which are held against the hand to produce heat on demand to warm up your hands. They can also be know as pocket warmers. Used correctly with proper outdoor clothing, when participating in outdoor activities in sub zero temperatures, such as mountain climbing, skiing, hiking, fishing, they help to assist the user in fighting off the cold. Warmers are not limited to the hand region though. There are many different types which can help with joint or muscular aches by providing heat to the affected area. They come in a range of types and prices.
But keep in mind that although reusable hand warmers are made with the hands in mind, they will also function on other areas of the body. This is great for anyone who spends a lot of time in a cold environment, or participates in winter sports activities.
The type that are in packets normally have adhesive strips, so they can attach to different bits of your clothes, like underwear or gloves to keep the selected bodyparts warm. Most times, they are not directly in contact with the skin, as this will lead to burning. If you get cold feet, there are models that can be inserted into your shoes or boots, or stuck onto your socks. However the reason you are hear is to learn about reusable hand warmers, so we will stick to that subject.
Some hand warmers are activated with air contact, and contain iron, water, cellulose, vermicilite, salt, and activated carbon and will produce heat from the exothermic oxidation of iron when exposed to air. How they work is the water will act as a catalyst, the activated carbon speeds up the reaction, and the salt also acts as a catalyst.
Supersaturated Solution Reusable Hand Warmers
Supersaturated solutions is the kind of reusable hand warmers that generate heat through the exothermic crystallisation of supersaturated solutions. Bending or snapping a small metal disc that is inside the pad is how the heat is generated. This particular action generates nucleation centers that initiate crystallisation. To dissolve salt in its own water of crystallisation, heat is required. The moment crystallisation is initiated, this heat is released. To recharge these types of reusable hand warmers, you need to boil the pads in water, and once they are in liquid state you can use them again.
Lighter Fuel Reusable hand Warmers
For something simple and convenient to use, look for a lighter fuel warmer. These types operate on lighter fuel, which will react with a platinum catalyst hence releasing heat by oxidation reactions. To reuse these particular types, all you need to do is refill the hand warmers. These types provide an excellent source of almost instant heat.
Battery Powered Warmers
Other types include battery powered warmers. With these particular types of reusable hand warmers, the electrically resistive heating devices convert electrical energy in the battery to thermal energy. They can operate off rechargeable batteries and disposable batteries, although some models can be picky. Like cellphones, these can be charged and recharged hundreds of times using the same battery. This is beneficial for the user as it saves money, and good for the environment.
Passive reusable hand warmers
And lastly we have the passive warmers.They can also be referred to as heatbands. They are worn around your wrist, and consist of a thin band of material. The blood vessels that are close to the skins surface are insulated, and reflect the body’s own heat back to the area using the hand warmers.
Above we have discussed some of the more popular types of hot packs and warmers. Some are more affordable than others, but it all depends how often you intend to use then. Choose wisely, and your reusable hand warmers will provide you with lovely warmth on the coldest of days.