Why don't Japanese lunches turn sour?

1, food is most likely to deteriorate at 30-40 degrees Celsius, so it is very important to put it in the refrigerator at low temperature after lunch.

2. In addition, the sealing performance of the lunch box can not be ignored.

Japanese often put prunes in rice, which can play an antiseptic role.

4. Around the lid of the lunch box, a little Japanese green mustard can also play an antiseptic role.

Extended data:

Food preservation method:

1, the leftovers should be put in the refrigerator as soon as possible.

The leftovers should be put into the refrigerator as soon as possible after being wrapped in plastic wrap, even if there is a certain temperature. It is important to pay attention to this. I'm sure you've read many news reports that hot meals and hot dishes can't be put directly into the refrigerator, because hot food suddenly enters the low temperature environment, which will instantly increase the temperature in the refrigerator, increase the workload of the compressor, make it more power-consuming, and also lead to frost inside the refrigerator.

In fact, the refrigeration efficiency of the refrigerator is very high at present. Putting hot meals in the refrigerator does increase the burden of the refrigerator slightly and consume more electricity, but the extra electricity is almost negligible and completely within the normal operation range of the refrigerator. It should be noted that the food stored in the refrigerator should be sealed with plastic wrap or box, which can not only prevent water vapor from frosting on the condenser tube of the refrigerator, but also prevent odor.

2. The storage time should not exceed two days.

Leftover food can't sit back and relax after being put in the refrigerator. Should not be stored for too long, try to eat as soon as possible. In fact, the function of refrigerator is not to kill bacteria, but to slow down the reproduction speed of bacteria through low temperature, thus slowing down the deterioration process of food. In other words, even in the refrigerator, food will go bad slowly after being stored for a long time.

So the shorter the storage time, the healthier the food itself. In addition, food stored for a long time will gradually lose its taste.