There are three component categories: quicklime, iron aluminum magnesium carbon powder and salt, and superimposed lime powder. Quicklime is used to react with water to release heat. Iron, aluminum, magnesium, carbon powder and salt react with water and air to produce primary cells and produce a large number of heated objects. Lime powder makes the heating reaction more intense and produces gas. Precautions for using the heating package: the heating package can only add cold water and can not heat water. Heating water may cause the water to boil violently before the cover is closed, which is easy to cause danger.
When heating with a heating bag, if the food to be heated is placed on the glass table, it is best to add a heat insulation pad at the bottom to avoid glass cracking.
After heating, be careful to remove the cover to avoid being scalded by steam. At the same time, pay attention to opening windows for ventilation to prevent carbon monoxide poisoning. （JiaReBaoLiMianZhuangDeShiShenMe）