Food Preservation

.Bottling tomatoes in Kilner jar > . 

Drying Apple Rings > .

Preserving Eggs in Waterglass > .

Food preservation includes food processing practices which prevent the growth of microorganisms (such as yeasts), or other microorganisms (although some methods work by introducing benign bacteria or fungi to the food), and slow the oxidation of fats that cause rancidity. Food preservation may also include processes that inhibit visual deterioration, such as the enzymatic browning reaction in apples after they are cut during food preparation. By preserving food, human communities are able to increase their food security through food storage and reduce food waste, thus increasing the resilience of local food systems and reducing their environmental impact of food production.

Many processes designed to preserve food involve more than one food preservation method. Preserving fruit by turning it into jam, for example, involves boiling (to reduce the fruit's moisture content and to kill bacteria, etc.), sugaring (to prevent their re-growth) and sealing within an airtight jar (to prevent recontamination).

Different food preservation methods have different impacts on the quality of the food and food systems. Some traditional methods of preserving food have been shown to have a lower energy input and carbon footprint compared to modern methods.

Traditional techniques .
Curing .
Cooling .
Freezing .
Boiling .
Heating .
Sugaring .
Pickling .
Lye .
Canning .
Jellying .
Jugging .
Burial .
Confit .
Fermentation .

Waterglass ..

French chef Nicolas Appert invented the method of preserving food by enclosing it in sealed containers. Among the earliest glass jars used for home canning were wax sealers, named in reference to the sealing wax that was poured into a channel around the lip to secure a tin lid. This process, which was complicated and error-prone, became popular in the late 1830s or early 1840s and was still used to seal fruit jars until about 1890. The wax sealing process was largely the only one available until other sealing methods were developed. Competitors including jars with stoppers, spring wires, wire bails, cantilevered wires, and thumbscrews all proved less successful.

Food - Importing vs Exporting Nations ..

Mason & Kilner Jars ..