Mineral wool is provided with the layer of a spraying-protective layer on it.

摘要

PCT No. PCT/SE81/00329 Sec. 371 Date Jul. 6, 1982 Sec. 102(e) Date Jul. 6, 1982 PCT Filed Nov. 10, 1981 PCT Pub. No. WO82/01766 PCT Pub. Date May 27, 1982.A method of drying wooden objects according to the invention shall be carried out in a closed treatment room (10) with a supply of microwave effect which heats the objects stacked in a unit so that the moisture is pressed out and removed. Each unit is positioned in a cover of heat insulation stuff which prevents cooling of the wooden objects by the air circulation in the room.