PURPOSE: To eliminate the apprehensions in enviromental disruption, safety to human bodies and inflammability and perform the good drying by a simple device in a short time.

CONSTITUTION: A complete fluorinated organic compound 3 which is not compatible with a volatile liquid 2 and having its boiling point higher than the boilding point of the volatile liquid 2 is heated above the boiling point. A material to which the volatile liquid adheres is immersed in the heated completely flourinated organic compound 3 until the volatile liquid 2 is evaporated and gasified and removed substantially. The completely fluorinated organic compound 3 adhering newly is gasified and dried in a vapor layer 6 of the completely fluorinated organic compound 3.