Freeze drying hydrangea petals involves using a specialized freeze-drying machine with two chambers: a specimen chamber and a condenser chamber. The process entails freezing the hydrangea petals to extremely low temperatures. Here's a breakdown of how it works:
- The freeze-drying machine has two special chambers: the specimen chamber (top) and the condenser chamber (bottom).
- Fill trays with the hydrangea petals.
- Place the trays inside the specimen chamber.
- The freezing process begins, lowering the temperature to around -40 degrees.
