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Dynamic interferometric imaging of the thickness distribution of evaporating thin liquid films

  • Jacqueline StammEmail author
  • Dominik Daume
  • Tobias Hartwig
  • Maximilian Oschmann
  • Julian Schäfer
  • Hans Martin Sauer
  • Edgar Dörsam
Article
  • 34 Downloads

Abstract

In functional printing, film homogeneity is a key criterion, but there are several phenomena leading to inhomogeneities. We shall focus on the solvent evaporation process of gravure-printed thin films. The best aspects of different published approaches are combined to create a new algorithm for optically determining the film thickness development. In this way, small structures as well as the overall thickness of large-area thin films can be tracked while drying. It becomes clear that the biggest challenge is balancing the camera resolution and frame rate to receive plausible and accurate results.

Keywords

Thin film interference Gravure printing Functional printing Drying films Thickness map Thickness evolution 

Notes

Funding

We kindly acknowledge the financial support by the Federal Ministry of Education and Research of the Federal Republic of Germany under grant No. 13N13692 and the German Research Foundation (DFG) within the Collaborative Research Centre 1194 “Interaction between Transport and Wetting Processes,” Project C01.

Conflict of interest

The authors declare that there are no conflicts of interest related to this article.

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Copyright information

© American Coatings Association 2019

Authors and Affiliations

  1. 1.Institute of Printing Science and TechnologyTechnische Universität DarmstadtDarmstadtGermany

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