Pearlescent Effect Pigments for Coatings on Textiles – Part II: Angle Dependent Coloration
Lena Charlyn Greiler, Anne Schwarz-Pfeiffer and Boris Mahltig
Niederrhein University of Applied Sciences, Faculty of Textile and Clothing Technology, Webschulstr. 31, 41065 Mönchengladbach, Germany
Abstract: Pearlescent effect pigments exhibit coloration as a result of interference effects. Coatings containing such effect pigments can be used for coloration of various materials like metals, papers, polymer foils or textiles. The current article reports on a special application for effect pigments as part of a textile coating leading to variable coloration depending on the angle of incidence of illumination. To record this angle dependent coloration, optical spectroscopy is performed in different reflection arrangements. Two different types of effect pigments based on silica SiO2, titania TiO2 and stannia SnO2 are evaluated as coating additives on a black polyester fabric. Finally, it is shown that pearlescent effect pigments are powerful materials extremely useful for the realization of special optical effects on textiles.
Keywords: Pearlescent effect pigment, interference, coating, optical spectroscopy, reflection, coloration.