Abstract
Texture is one of the important factors to characterize appearance of products. However, its quantitative evaluation is difficult and the proper evaluation method has not been developed yet. In order to solve this problem, in the present study, we proposed several parameters applicable for quantitative texture evaluation. Copper alloys, representative chromatic colored metals, were used as test materials. The surface color was controlled by using Cu-Zn and Cu-Sn alloys with different compositions. A series of alloy plates with various surface roughness conditions were prepared by shot-blasting. Effects of surface roughness on glossiness and surface color were investigated for shot-blasted surfaces. With decreasing surface roughness, glossiness increased, while, lightness of surface color decreased. In contrast to that, hue of surface color is a characteristic color parameter for each material and never change with surface roughness. The present experimental results showed that the texture can be evaluated quantitatively by using three combined parameters: surface roughness, glossiness and surface color.
