Sterilization in canning does not require a level of sterility, but does not allow the presence of pathogenic and toxigenic bacteria. At present, the determination of canned sterilization is not based on experience, but the use of scientific methods to calculate and obtain quite accurate theoretical values, if necessary, sterilization conditions can be determined by inoculation test. Canned food combines nutrition with hygiene and taste, greatly increasing the edible value of food. Canned food is the genius of applied ecology.

When this is done, place the cap lightly on the top of the bottle, remembering not to cover it. Then put the bottle in a pot of water and heat it for a while. Then wrap the bottle in a towel and put the lid back on it. If the lid is hollow in the middle, it means the production was successful. If that doesn't mean the bottle is leaking, then you should throw it out today or it will go bad and mouldy.