Drying

Drying is preservation by taking water out of food. NCHFP treats it as a method that removes water and as a complement to canning and freezing, not a replacement for them ¹. Pieces get smaller and lighter. You add water later if you want the old shape.

It is not Canning. A sealed jar of low-acid food still needs a researched pressure process because moist, low-oxygen, low-acid food is the botulinum problem ². Dry beans in a bag are a different claim.

Water is the lever #

Evaporation is how the water leaves — air, heat, time. Water activity is why microbes care. Moisture targets depend on the food and storage conditions rather than one universal percentage. Feel the food: fruit often finishes leathery; many vegetables finish brittle. Uneven pieces finish at different times. If a piece still beads moisture in a jar, it was not dry.

Enzymes are a different step #

Blanching, not the dehydrator, is NCHFP’s heat step to slow enzymes that wreck flavor, color, and texture ³. Some vegetables are blanched before they are dried; follow a tested drying instruction, not a guessed minutes-from-freezing. Enzymes explains the worker.

What to observe #

Look. No visible wet centers. No mold later.

Smell. Concentrated food, not musty.

Feel. Leathery versus brittle, as the food requires. Case-hardened pieces are dry outside and wet inside — a heat-too-high failure.

Store dry, sealed, and labeled. Food safety still applies to the kitchen around the dryer. Preserving is the branch hub.