This paper proposes a novel method to investigate the property of a tiny ink dot in its drying process from its gelation to solidification using digital holographic microscopy and tackiness measurement. The method can analyze a variation of an ink dot having a diameter of a few hundred micrometers by using temporal variations of volume, height and contact angle of the ink dot calculated from reconstructed complex amplitudes of the light transmitted through the ink dot. In addition, the tackiness of the ink dot is evaluated using a handmade measurement device having a micro cantilever as the sensing probe. The experimental results using a commercially available water-based magenta ink ejected on a glass plate are presented.

本文提出了一种新颖的方法，使用数字全息显微镜和粘性测量技术来研究微小墨点在从胶凝到固化的整个干燥过程中的特性。该方法可以通过使用从透射过墨点的光的重构的复振幅计算出的墨点的体积，高度和接触角的时间变化来分析直径为几百微米的墨点的变化。另外，使用具有微悬臂梁的手工测量装置作为感测探针来评估墨点的粘性。给出了使用在玻璃板上喷射的市售水基品红色墨水的实验结果。