An effective way to ensure the freshness of stored food is

The effective way to ensure the freshness of stored food is: first in first out.

Methods of food preservation:

1, refrigerator preservation: Most people in China's "food storage" method is a refrigerator to handle everything, thinking that food will not rot and deteriorate, which is absolutely safe. Actually, the refrigerator is definitely not a safe! The nutritional value of food lies not only in its innate growth factors, but also in its acquired preservation environment.

2, plastic wrap, plastic wrap: In order to overcome the defects of refrigerator freezing, people have begun to widely use plastic wrap and plastic wrap to preserve food. After packaging with plastic wrap and fresh-keeping bag, the evaporation of food moisture slows down, and the fresh-keeping time is several times longer than that stored in refrigerator without treatment, which can also solve the problem of food odor to some extent.

3. Traditional conjoined crisper: It has been popularized in the market. The fresh-keeping function of this fresh-keeping box is further than that of plastic wrap and fresh-keeping bag, and the odor is basically solved.

However, there are also problems in the design of this kind of fresh-keeping box: if the box cover and the box body are close together, although the tightness is greatly enhanced, it is difficult to open and close, which is not suitable for the elderly and children; But if it is easy to open and close, it will greatly reduce the sealing performance of the crisper.

4. New concept fresh-keeping box: In order to solve the problem of the traditional conjoined fresh-keeping box, the latest fresh-keeping box has introduced a new product with double lock system after systematically studying the problems existing in the traditional fresh-keeping box. It adopts the way of four-sided combination to seal the box surface, and the surrounding pressure is uniform, which can achieve the sealing effect of 100%.