The Drying Mechanism of the Japanese Lacquer by the Infra-red Ray

Abstract

Fixation of the Japanese lacquer by baking, which undergoes oxidation, polymerisation or condensation, has been considered very troublesome, The writers of this note got a successful result, a short-time fixation, by use of infra-red drying. Temperature-raising curve, suitable to accelerate the proper chemical reaction of the specimen, was first searched after, by controlling the intensity of illumiration by transferring the infra-red lamps. Thus the illumination curve, against time, suitable for cach specimen was obtained. Some researchers control the intensity of illumination by dropping the electric voltage. But, even when the intensity of illumination on the Japanese lacquer surface is kept the same by approaching the lamps, the lowering of temperature of the heat source causes the increase of the wave length beyond its suitable range, and reduces the drying efficiency, diminishing the hardness of the Japanese lacquer film, as means the in completion of the baking.