Monthly Archives September 2010

Just add water – freeze drying to the fore !

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Freeze-drying works by freezing the material and then reducing the surrounding pressure to allow the frozen water in the material to sublime directly from the solid phase to the gas phase.

Freeze-dried substances may be stored at room temperature without refrigeration if the material is sealed to prevent the reabsorption of moisture as the greatly reduced water content inhibits the action of microorganisms and enzymes that would normally spoil or degrade the substance.

The picture shows a freeze drier that we have recently supplied process control components for.