Currently,the core elements of 3D printing technology are not only the construction of model shapes,but also higher precision in color reproduction.Due to differences in coloring methods,the color reproduction of 3D printed objects varies,thereby affecting the precision of color reproduction and analytical evaluation in 3D printing.Therefore,in this study,based on UV 3D printing,the printed models using three different coloring methods were designed including infill color mode and surface color mode(single-layer surface color mode and double-layer surface color mode).It investigated the impact of coloring methods and the number of color layers on the color reproduction quality of the surfaces of various colored 3D models,including an analysis of luminance,density,and color difference.The results showed that with the same number of layers,fewer color layers result in higher brightness,lower density,and smaller color deviation.This suggested that boundary coloring is superior to full-area coloring,and the fewer color layers on the surface,the better the reproduction effect.This study can provide the theoretical basis and support for the color reproduction in 3D printing.
Color 3D printingColoring methodColor reproductionColor evaluation
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