What is pasteurization? To get the opportunity to store food in glass jars for the longest time possible only after sterilizing the containers. So that the workpieces do not deteriorate, you need to not only follow the recipe exactly, but also know how to prepare the container, having cleaned it of contaminants and microorganisms.
What is pasteurization of cans and why is it required?
The method involves
cleaning containers for canning products under the influence of high temperature. They resort to such actions in order to destroy microorganisms. The development of the latter in sealed glass containers can lead to rapid spoilage of food.
What are the conditions for pasteurization? To achieve the desired effect, preservation containers must first be warmed up at a temperature not lower than 85 ° C. To completely destroy the bacteria, whose vital activity can lead to food spoilage, the banks must be heated for a long time. A thermometer is usually used to track the required indicators, raising and lowering the temperature, which allows to achieve this goal.
Pasteurization of cans with blanks and without - a reliable solution for long-term storage of preservation in the cellar, refrigerator. Let's find out how to properly prepare glass containers.
Steam pasteurization
One of the easiest and most affordable ways is to prepare glass containers for clogging preservation using a conventional steam pan. What does the method suggest? A metal grid, a sieve, any other convenient device with holes is placed on a pan filled with warm water. It houses banks that are turned upside down.
What is steam pasteurization? The essence of the method is boiling water, which uniformly pours steam from the bottom up. This heat treatment should last at least 15 minutes. At the end, the jars must be removed from the lattice, placed upside down on a clean towel.
In the oven
An effective solution is the preliminary calcination of glass containers for preservation in the oven. After thorough washing and rinsing, wet cans are placed in a preheated oven. Here, a temperature of about 160 ° C is set. Pasteurization in the oven of glass containers continues until moisture completely evaporates from their surface.
Microwave Ovens
You can also prepare glass containers for canning products in the microwave. To do this, the bottom of the containers must be pre-coated with water about 1 cm. Pasteurization in the microwave involves heat treatment of the cans at a power of about 800 W for 5 minutes. Subject to the above procedure, the container will be uniformly blown off with steam.
Pasteurization of cans with blanks
Quite often there is a need for pasteurization of not only glass containers, which is used for preservation, but also the finished product. Usually squash caviar, salads, lecho, and other vegetable dishes need this. Do not require heat treatment before corking in jars for long-term storage of tomatoes, pickles, jam.
What is pasteurization with blanks? The procedure involves the following:
- cans filled with finished products are covered with lids that are boiled in advance;
- glass containers prepared in this way are placed in a pan;
- the cans are covered with warm water so that the liquid reaches approximately to the shoulders of the containers, but does not touch the neck;
- at the bottom of the pan, it is advisable to lay a wooden circle in advance, which will not allow the container to rub against each other during boiling;
- at the end of the tank is subjected to heat treatment, then pulled out and ordered.
How long should pasteurization of glass containers with blanks placed in it last? If the products are placed in 1 liter jars, boiling for 10-15 minutes is enough. Pasteurizing two-liter containers will take about 20 minutes. As for the three-liter containers, the latter is pasteurized with the blanks for about 30 minutes. The indicated time periods are applicable to prepare for preserving fruits, liquid salads, and tomatoes. Fried foods need to be pasteurized for a few minutes longer.
Useful Tips
There are several recommendations, following which will avoid troubles during pasteurization of cans and storage of clogged products:
- For canning, it is worth using exclusively new covers. Used products that contain scratches on the surface or deformation will not allow you to count on long-term storage of workpieces.
- Before canning, thoroughly clean the food. It is advisable to rinse the workpiece several times under running water.
- When pasteurizing containers in a pan, do not put them on the bare bottom of a metal container with boiling water. Indeed, in this case, the glass can easily burst.
Eventually
So we found out what methods exist for high-quality sterilization of cans for preservation at home. In conclusion, it is worth noting only that the observance of the features of the technological process of preparing products for long-term storage in the off-season is the key to the use of safe appetizing food.