Interdependence of Lightness and Geometric Attributes in Metallic Color Systems

Document Type : Original Article

Authors

1 School of Chemical Engineering, College of Engineering, University of Tehran, P.O. Box: 57131-14399, Tehran, Iran

2 Department of Color Physics, Institute for Color, Science and Technology, P.O. Box: 16765-654, Tehran, Iran

3 Department of polymer and color, Amirkabir University of Technology, P.O. Box: 159163-4311, Tehran, Iran

10.30509/jcst.2025.167569.1261

Abstract

Metallic coatings are highly attractive due to their visual appeal and widespread use in various industries, particularly in automotive applications. However, their complex angle-dependent optical behavior poses challenges for accurate characterization. In this study, 308 Pantone metallic samples were systematically evaluated using a spectrophotometer, a goniospectrophotometer, a goniophotometer, and a gloss meter at various angles. The results revealed that specular gloss and Reflected Specular Peak (RSPEC) exert the most significant influence on lightness, while the distinctness of the image showed weak correlation in semi-matte samples. Overall, the findings highlight that combining geometrical attributes with lightness parameters offers a reliable approach for understanding and predicting the appearance of metallic coatings in industrial applications.

Keywords

Main Subjects

References

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