Surface gloss measurement using a gonio-spectrophotometric method

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A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
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Authors

Date

2025

Department

Department of Electrical Engineering and Automation

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Mcode

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Language

en

Pages

9

Series

Journal of Coatings Technology and Research

Abstract

This study compares gloss measurements for high-, medium-, and low-gloss samples using an angle-resolved gonio-spectrophotometer and a commercial glossmeter, demonstrating close agreement between the two instruments within stated measurement uncertainties. The gonio-spectrophotometer’s angular scanning capability enables a detailed investigation on how receptor aperture size and positioning influence gloss uncertainty. Using narrow aperture reflectance scans, we characterize the full reflectance distribution of each sample and quantify its impact on calculated gloss values. Results show that accurate estimation of aperture-related uncertainty requires resolving the angular profile of the specular peak, especially when the reflectance curve exhibits significant diffuse scattering. We present a practical procedure for determining gloss uncertainty from the measured reflectance distribution. This approach not only enhances the precision and reliability of gloss measurements across a wide range of gloss levels but also offers a framework that can inform the refinement of international gloss measurement standards.

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Publisher Copyright: © The Author(s) 2025.

Keywords

Aperture, Gloss, Glossmeter, Gonio-spectrophotometer, Uncertainty

Other note

DOI

10.1007/s11998-025-01249-7

Citation

Rastgou, M, Manoocheri, F & Ikonen, E 2025, 'Surface gloss measurement using a gonio-spectrophotometric method', Journal of Coatings Technology and Research. https://doi.org/10.1007/s11998-025-01249-7

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https://urn.fi/URN:NBN:fi:aalto-202512028967

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[article-cris] Sähkötekniikan korkeakoulu / ELEC