| 摘要 |
PURPOSE:To secure a prevention of mis-transfer in a printing part and a high density of the printing by specifying an index of unevenness of film thickness in the paper making direction in a carrier consisting of resin-coated paper in which the image receiving side of a paper substrate consisting mainly of natural pulp is covered with polyethylene resin. CONSTITUTION:The heat transition type thermal transfer recording material includes paper, as a substrate, consisting mainly of natural pulp and resin-coated paper, as a carrier, having an image receiving side surface in its one side covered with polyethylene resin. On the resin-coated paper surface, an image receiving layer for heat transition type thermal transfer recording is provided. in this Instance, a carrier for the resin-coated paper is made to have an index of unevenness of film thickness set at 170mV or lower in the paper making direction. Herein, for measuring the index of unevenness of film thickness, at first, test piece is permitted to run at constant velocity between two spherical indexes to measure the fluctuation of thickness in the paper making direction. Next, the value of measuring signals is subjected to fast Fourier transformation to obtain a power spectrum by an integral addition average. Subsequently, the value of power in a specific frequency area is totalized, and then the value multiplied by 2/3 is raised to the 1/2 power. |
