Why is the skin of the soles of the feet not burned by the fire when the fire dancer steps barefoot

Because ** is coated with a heat-insulating substance plus flame retardant, and the kind of carbon used may be a special material (the heat of combustion is relatively small)!

When a human body comes into contact with a red-hot object,** it does not immediately rise to the same height as the object it touches.

Some people use the heat conduction formula to calculate, the temperature of the soles of the feet only rises to 35 degrees Celsius when the firefighter steps barefoot on the charcoal fire, that is, the temperature of the ** of the soles of the feet is 37 degrees Celsius + 35 degrees Celsius = 72 degrees Celsius.

This temperature is insignificant compared to the temperature of a red-hot charcoal fire (600 degrees Celsius). Of course.

Dancers are generally well-trained without injury.

Professional issues shouldn't be left to us.

Either the charcoal fire temperature is not high.

Either the soles of the feet have been specially treated.

1.Pre-attach a layer of insulating sheet under the foot.

2.Apply a layer of white vinegar, borax or other insulating potions or chemicals under your feet in advance.

3.Before the performance, sticky substances such as glutinous rice porridge and paste are poured into the shoes. Then the assistant will put a bag of insulating powder on the edge of the fire, that is, it is very useful to put a pile of ordinary brick powder and coal powder.

As soon as the performer takes off his shoes, he steps on the powder, and a layer of powder naturally sticks to his feet, and then there will be no major problems in the sea of fire. At the same time, the speed is extremely fast, and you can't burn your feet.

4.Sprinkle a thick layer of salt over the charcoal fire. Because salt is a coolant, it can reduce the temperature of the carbon.

First of all, the technique is very important, they really step on the fire for a short time, please look carefully, although it is very hot, but in fact, each time the time is not long, usually less than 1 second. In addition, the soles of the human feet themselves belong to a special structure, there is a certain fat pad, so it is very wear-resistant and heat-resistant, after a certain amount of exercise, the cuticle will continue to thicken, which will further enhance the ability to wear and heat resistance, so there is something to step on the fire, step on broken glass, step on the kitchen knife, steel nails or something.

The reason why we have such doubts is due to an incorrect concept: as soon as the human body comes into contact with a red-hot object, the temperature of ** immediately rises to the same level as the object it touches. This is not the case, some people use the heat conduction formula to calculate, and assume that the charcoal is burned to 600, the thermal activity of the charcoal is 100 units, the thermal activity of ** is 1500 units, the body temperature of the person is 37, and the temperature of the sole of the foot ** is calculated to be only 35, that is, the temperature of the sole of the foot ** is 37 35 72 in total.

This temperature is obviously insignificant compared to the temperature of a red-hot charcoal fire (600 °C).

Of course, it is also uncomfortable for the sole of the foot to increase the temperature by 35, and the sole of the foot may also cause burns, redness and swelling. Fire dancers are generally not injured because they are well trained. First of all, after long-term training, the dancer has a thick layer of calloused skin on the soles of his feet, and when he dances, he seems to wear a pair of thin-soled shoes to protect the soles of his feet from burns.

Secondly, the charcoal on the dance floor should be broken into the size of a bean, and the small and loose charcoal can reduce the amount of thermal activity, so that the temperature of the soles of the feet does not rise too much. Of course, great care should be taken not to mix the charcoal with some objects with high thermal activity, such as stones, iron nails, etc., so as not to burn the soles of the feet**.