[DP5] 2.5D, Decorative Printing Session 3

[DP5-03] Color Mixture of Interference Color by Niobium Oxide Thin Film Formed on Metal Substrate

*Yuta Abe¹, Norihiko Sawaki¹, Shuichi Maeda¹ (1. Tokai University)

An anodic oxidized niobium (Nb) layer on Nb plate makes various colors. The mechanism of coloration is thin film interference of the anodic oxidized layer on the Nb plate. However, color development by anodic oxidation is related to the thickness of oxidized Nb layer, it is impossible to add another color on the colored Nb plate. The focus of this research is to make a checkerboard pattern on the Nb plate by photolithography and mix two interference colors by juxtaposed additive color mixture. Consequently, we succeeded in mixing two interference colors and obtaining a new color.