The Influence of the Measuring/Viewing Angle on the Color of Injection-Molded Plastics
Artikel i vetenskaplig tidskrift, 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.

surface texture

gloss

color perception

viewing angle

gloss

polymer

color measurement

Författare

I. Arino

Volvo

Antal Boldizar

Chalmers, Material- och tillverkningsteknik, Polymera material och kompositer

Sofie Ignell

Chalmers, Material- och tillverkningsteknik, Polymera material och kompositer

Hanna Karlsson

Chalmers, Material- och tillverkningsteknik

Ulf Kleist

Volvo

Sabina Rebeggiani

Chalmers, Material- och tillverkningsteknik

Mikael Rigdahl

Chalmers, Material- och tillverkningsteknik, Polymera material och kompositer

International Journal of Polymeric Materials and Polymeric Biomaterials

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

Vol. 59 4 292-306

Ämneskategorier

Materialteknik

DOI

10.1080/00914030903333070