Fig. 3.

Measured reduced optical scattering and optical absorption coefficients of gel wax compounds with TiO₂ and carbon black ink as additives. The two columns present how the optical scattering and absorption can be controlled. In the left column [(a),(c),(e)], the concentration of TiO₂ was varied and the concentration of carbon black ink was held constant. In the right column [(b),(d),(f)], the concentration of carbon black ink was varied and the concentration of TiO₂ was held constant. Each measured data point was obtained by averaging across 4 different spatial locations. Linear fitting was performed for the data in (c) and (d).