Abstract: A drying method and a device each employ a specific range of infrared radiation which has a high transmissivity relative to a coated layer formed on a metal substrate and a high absorptivity relative to the substrate. The energy transmitted through the coated layer is absorbed in the substrate and changed into heating energy to heat the substrate surface. The backsurface of the coated layer is also heated and solidified. The surface of the coated layer is solidified at the termination of the drying process so that surface is not injured by evaporation of solvent from the coated layer. A combination of infrared radiation and a blow of hot air ensures that the coated layer will not experience irregular heating which helps to prevent the generation of pin holes in the coated layer and shortens the drying period. The blowing direction is oriented in the same or at right angles to the infrared radiation.

Abstract: A drying method and a device employs each apply to a substrate having a coated layer thereon, a first infrared radiation which has a high transmissivity relatively to the coated layer and a high absorptivity relative to the substrate, and a second infrared radiation which has a high absorptivity relative to the coated layer. The first infrared radiation is applied to the coated layer on the substrate and the second infrared radiation is subsequently applied. The energy transmitted through the coated layer is absorbed in the substrate and changed into heating energy to heat the substrate surface. Solvents in the coated layer are evaporated due to the heat passing from the heated substrate surface to the back surface of the coated layer. The energy absorbed by the coated layer accelerates the hardening of the coated layer.