Self heating food is a kind of prep

Self heating food is a kind of prepackaged food which is heated by its own heating package instead of electricity or fire. When in use, just put the special heating bag at the bottom of the food box, and a cup of cold water can make steaming food. Self heating food with a heating package, the temperature will rise when meeting water, and the heating package is mainly composed of iron powder, aluminum powder, coke, activated carbon, quicklime and other materials. A complete set of self heating food is generally composed of three parts: heat source, activator and food. Heat source refers to the chemical substance that can produce heat without producing open fire. Activator refers to the substance that can react with heat source to produce heat. The two react to generate heat, which is used to heat the pre-treated semi-finished food. As mentioned above, the exothermic process of self heating food is a chemical reaction process. The common combinations of heat source and activator are quicklime + water, iron powder + oxygen, aluminum powder + alkaline aqueous solution, etc.