EFFECTS OF COLORS AND DIVING ANGLES OF FI BERS ON THERMAL ABSORPTION BY WOOD SURFACES

This paper deals with the effects of colors and diving angles of wood on the heat absorption by wood surfaces when the surfaces are irradiat ed with incandescent lamps. From the rate of temperature rise in the i rradiated edge-grained wood surfaces of spruce (Picea sp.) with black, green, and red stained surfaces, it was calculated that the heat abso rbances of these stained wood surfaces were about 3.3, 2.0, and 1.6 ti mes respectively, that of unstained surfaces. The end surfaces absorbe d 1.2 times more heat than did these of edge-grained surfaces.