Pearliness as an Intrinsic Characteristic of Surface

Abstract

The perceived pearliness values of pink colored UV coated polycarbonate samples having three different pearlescent particle sizes and five different densities are investigated to be compared with the previous study using the similar samples. Each sample"s pearliness is estimated in the viewing both illuminated with D65 using magnitude estimation method. In total twenty-one observers estimate thirty samples in the experiment. The data analysis results show that the perceived pearliness values are mostly affected by the average pearl particle sizes than densities. Also comparison between two independent pearliness data sets shows that number of observers and the number of samples can play an important role to decide the pearliness scale. The conventional color measurement data such as gloss and CIELAB cannot predict the perceived pearliness phenomena. Further research is needed to establish the metric to predict the visual pearliness based on the measurement data.