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High frequency drying       

High-frequency drying, also called capacitive or dielectric drying, is used in various areas for the gentle drying of substances that contain water or moisture.

With high-frequency drying, the required heat is not applied externally, but arises in the workpiece itself, and more humid areas are heated more than less humid areas.

The workpiece to be dried is positioned between two metallic plates, which form an electrical capacitor, and is exposed to a high-frequency alternating field.

Many electrically non-conductive materials are suitable for high-frequency drying, e.g. wood or plastics.