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Characterizing Scratch Appearance on Polymer Coatings and Plastics:Effects of Illumination and Pigment Color

Published

Author(s)

Li Piin Sung, Haiqing Hu

Abstract

Scratch resistance is a desirable coating characteristic and is a key critical performance property in industry for evaluating the durability of polymer coatings and plastic products. Recent advances in optical scattering measurements have provided a quantitative way to evaluate the scratch resistance objectively by relating surface deformation (scratch morphology) to appearance attributes. In this paper, effects of illumination and pigment color on the scratch appearance have been investigated. Specular and off-specular intensities from scratched surfaces, containing different color pigments, were measured using different illumination wavelength and incident/scattering angles. The scattering signal from the scratch was compared to the background signal from the unscratched surface, and the ratio of these two signals was used to evaluate the visibility of the scratch.
Proceedings Title
2009 CoatingsTech Conference
Conference Dates
April 28-29, 2009
Conference Location
Indianapolis, IN

Keywords

Coatings and plastics, color pigment, laser scanning confocal microscopy, optical scattering, specular reflection, surface roughness, scratch visibility

Citation

Sung, L. and Hu, H. (2009), Characterizing Scratch Appearance on Polymer Coatings and Plastics:Effects of Illumination and Pigment Color, 2009 CoatingsTech Conference , Indianapolis, IN (Accessed June 17, 2024)

Issues

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Created April 12, 2009, Updated August 25, 2020