The Influence of the Measuring/Viewing Angle on the Color of Injection-Molded Plastics
Journal article, 2010

A multi-angle spectrophotometer was used to measure the CIELab coordinates L∗, a∗ and b∗ in different angles relative to the incident light. The specimens used were acrylonitrile-butadiene-styrene injection-molded plaques in different colors and with different surface textures. Variations in the coordinates when changing the measuring angle depended on the color and the texture. In general, however, smooth (glossy) surfaces were measured to be darker and of higher chroma than textured surfaces and as the gloss of the surfaces decreased (due to texturing), the lightness of the surfaces increased and the absolute values of a∗ and b∗ decreased over the range of measuring angles (not too close to the specular reflection angle). A psychometric study involving a human test panel was used as a complement to the measurement. The agreement between the measurements and this study cannot be said to be satisfactory, unless the variation in the color coordinates was quite clear. Possible reasons are discussed.

gloss

gloss

color perception

color measurement

polymer

viewing angle

surface texture

Author

I. Arino

Volvo Cars

Antal Boldizar

Chalmers, Materials and Manufacturing Technology, Polymeric Materials and Composites

Sofie Ignell

Chalmers, Materials and Manufacturing Technology, Polymeric Materials and Composites

Hanna Karlsson

Chalmers, Materials and Manufacturing Technology

Ulf Kleist

Volvo Cars

Sabina Rebeggiani

Chalmers, Materials and Manufacturing Technology

Mikael Rigdahl

Chalmers, Materials and Manufacturing Technology, Polymeric Materials and Composites

International Journal of Polymeric Materials and Polymeric Biomaterials

0091-4037 (ISSN) 1563-535X (eISSN)

Vol. 59 4 292-306

Subject Categories

Materials Engineering

DOI

10.1080/00914030903333070

More information

Latest update

11/26/2018