The Basics of Freeze-Drying
Freeze-drying, commonly known as lyophilization, is a preservation technique that brings a liquid substance, such as breast milk, to a frozen state and then removes the water content by sublimation. In layman’s terms, this means transforming ice directly into vapor without liquid phase participation, making it an ideal method of preservation. That way, your breast milk maintains its nutritional integrity and is ready for use whenever required.
Steps for Freeze-Drying Breast Milk:
1. Vacuum-Freeze
Your frozen breast milk is placed into a special chamber. A pump removes the air from the chamber, bringing it to a deep vacuum.
2. Sublimation
The milk's ice crystals turn into water vapor. In the vacuum chamber, the water vapor molecules are pulled out of the milk, leaving behind all other components as powder.
3. Package & Seal
Your breast milk powder is sealed in high-barrier mylar bags, protecting it from moisture, oxygen, UV light, and contamination. It’s now shelf-stable for 3 years without refrigeration.