Lisa Marie's
Offering speciality freeze-dried treats since 2022
What is
freeze-drying?
Freeze-drying is a dehydration technique based on the sublimation of water in a product. This means that the product’s water content transitions from a solid to a gaseous state — or from ice to vapor — without going through the liquid state.
What are
the steps?
The freeze-drying process can be divided into three steps:
1. Freezing: The product is often frozen under atmospheric pressure.
2. Primary drying: Also known as proper freeze-drying, this is the sublimation step in which frozen free water is removed.
3. Secondary drying: Also known as desorption drying, it’s the drying of products to their desired humidity by removing the remaining bound water.
What are
some benefits?
Freeze-drying is considered a high quality dehydration method for a couple of reasons, including:
-
It operates at low temperatures, which contributes to preserving a product’s nutritional value, taste, appearance, and heat-sensitive compounds
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Freezing inhibits chemical and microbiological processes, which significantly delays the product’s deterioration, thereby extending its shelf life (sometimes up to 25 years!)