Drying process of an ink-dot analyzed using both digital holographic microscopy and tackiness measurement

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 b...

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Bibliographic Details
Published in:Microelectronic engineering 2021-03, Vol.241, p.111543, Article 111543
Main Authors: Yokota, Masayuki, Aoyama, Fumiya
Format: Article
Language:English
Subjects:
Contact angle
Diameters
Digital holographic microscope
Drying
Drying process
Glass plates
Height
Holography
Image processing systems
Ink & ink industry
Ink dot
Measurement
Micrometers
Microscopy
Quantum dots
Solidification
Tackiness
Tackiness measurement
Volume
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Summary: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. [Display omitted] •Drying of an ink dot is investigated by digital holographic microscope.•Height, volume and contact angle of the dot is evaluated on the glass plate.•Variation of tackiness of the ink dot is compared with the dryness of the ink dot.•Height decreases by a half within 500 s in the drying stage.
ISSN:0167-9317
1873-5568
DOI:10.1016/j.mee.2021.111543