This study concerns about nanoparticles pigmented coatings used in controlling the radiative properties of surfaces exposed to sunlight. The desired coatings increase the near infrared reflectance while decreasing the reflectance of visible light. Both experimental and numerical approaches are followed in achieving desired spectral behavior. For this study the pigmented coatings are made using TiO₂ as dispersed particles, clear acryl synthetic as matrix, and standard black paper as substrate. The spectral reflectance is measured by spectroscopy in visible and near infrared regions. The effects of the size distribution and volume fraction of pigment particles and coating thickness on spectral reflectance of pigmented coatings are analyzed in this study.

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