The effect of gloss on color

✍ Scribed by Edul N. Dalal; Kristen M. Natale–Hoffman

• Publisher: John Wiley and Sons
• Year: 1999
• Tongue: English
• Weight: 100 KB
• Volume: 24
• Category: Article
• ISSN: 0361-2317
• DOI: 10.1002/(sici)1520-6378(199910)24:5<369::aid-col8>3.0.co;2-a

✦ Synopsis

A model was developed for the effect of gloss on reflected color, taking the measurement geometry of the color measuring device into account. It considers the total front surface reflectance of a given sample to be independent of gloss and determined only by its refractive index and the angle of the incident beam. Although the total front surface reflectance is fixed, its specular component increases (and the diffuse component decreases) with increasing sample gloss. Therefore, the diffuse reflectance factor measured by a spectrophotometer decreases with sample gloss. In this article, a defined curve was fitted to the measured reflectance factor of black xerographic print samples having a range of gloss values for the 0/45 and diffuse spectrophotometer geometries, and this curve was used to predict the CIELAB color values for samples of the other colors at various gloss levels. The predicted color was compared to the measured color for cyan, magenta, yellow, red, green, and blue images that spanned a wide range of gloss. The RMS color error between the predicted and measured color of all of these images was found to be about 3 CIELAB ⌬E* units.