Purkitusta

Purkitusta is a Finnish term that translates to "canning" or "jarring" in English. It refers to the process of preserving food by sealing it in airtight containers, typically glass jars, and then heating them to a temperature that destroys microorganisms and inactivates enzymes. This process creates a vacuum seal as the jar cools, which prevents spoilage and allows the food to be stored for extended periods at room temperature.

The practice of purkitusta has a long history in Finland, particularly as a method for preserving seasonal produce like fruits, berries, and vegetables. It allows households to enjoy the bounty of summer and autumn throughout the colder months. Common items preserved through purkitusta include jams, pickles, sauces, and cooked meals.

The basic steps of purkitusta involve preparing the food, packing it into sterilized jars, sealing the jars, and then processing them using methods such as boiling water bath canning or pressure canning, depending on the type of food. Proper sterilization of jars and lids is crucial to prevent contamination. The effectiveness of purkitusta lies in the creation of a vacuum seal, which is often tested by ensuring the lid remains concave after cooling. This traditional method remains popular in Finland for its sustainability and its ability to retain the flavor and nutrients of the preserved foods.