| 摘要 |
PURPOSE:To obtain a high-quality image substantially free from drop-out or irregularity in recording without requiring any special treating on a mechanical system, by setting the GS smoothness of a recording surface of a recording sheet to be not lower than 300sec. CONSTITUTION:A specimen 1 is clamped between a rigid body 2 having a gas- penetrating hole 3 and a gas-shielding rigid body 4, then the pressure in the hole 3 is reduced to measure the period of time required for air to pass therethrough, thereby measuring the GS smoothness of the specimen 1. The thus obtained GS smoothness is an evaluation of total uniformity including the conditions of both surfaces of the specimen 1, uniformity of thickness and that of density. A recording sheet having high uniformity in terms of the GS smoothness of not lower than 300sec is used, and a heat-sensitive color forming layer, a coloring material adsorbing material layer or a proton doner layer is provided thereon to obtain a heat-sensitive recording paper, a heat-sensitive transfer recording paper on an electrostatic recording paper. |
