Warmer for hands

Gloves are a necessary accessory for winter. But on some days there are such frosts that even the warmest mittens do not save our hands from the cold. That's why the device was created, such as a hand warmer. About it, we'll talk. Warmers are of two types - petrol and salt. The latter type is usually used in everyday life, for example, with a long wait for public transport at a stop. But a gasoline handheld heater is simply necessary in extreme situations, hiking and fishing.

Salt Hand Warmer

Externally, the salt pad is a small pillow of various shapes (star, crescent, heart, rectangle, etc.), inside of which is a transparent gel-like liquid and a small metallic applicator. The principle of operation of such a handheld handheld heater is based on the effect of heat generation on the crystallization of salts of supersaturated solutions, most often sodium acetate. When we bend the applicator, the solution in the pad begins to crystallize. In this case, heat is released, and the heating pad itself is heated to a temperature above 50 ° C for three to four hours. After use, the heating pad must be lowered into boiling water for 15 minutes, then removed, dried and re-used.

As you can see, the main advantages of salt hand warmers include simplicity and reusability of use, as well as cheapness.

Petrol hand warmer

Gasoline, or catalytic, hot-water bottle reminds of its appearance a cigarette case with a metal case the size of a phone. Such a device consists of:

The principle of the gasoline heater is based on the release of heat during the oxidation of petrol vapors in a flameless manner. Oxidation products leave through the holes of the cover and warm your hands. Start the catalytic heater by heating the catalyst for 15 seconds with the flame of the lighter or gas burner. To warm up the frozen hands is necessary, having put on a warmer a special cover thanks to what there will be no burns. Among the devices produced, the Zippo hand warmer, a famous American brand, with recognized quality and safety is especially prominent. Also a great product for warming hands and a Korean firm Kovea.

The merits of this type of hot-water bottle include the duration of work (up to 24 hours) and the efficiency of work (not only hands are warmed).