... , in the case of red-coated far infrared lamp, the red-coloredcoating prevents the inner heat from being emitted outward, so the ... 6 to 14. Far infrared rays absorbed are penetrating intoour body due to its property, causing generation of heat. Accordingly, thethermal effect ... , in the case of red-coated far infrared lamp, the red-coloredcoating prevents the inner heat from being emitted outward, so the ...