for all samples. The initial reflectance values were 92.7, 87.7, and 89.1 for the CaCO 3, CMB, and commercial paint, respectively. These values were much lower than the glass bubble samples (GB1=94.9, GB2=94.8, GB3=95.6), indicating that the GB samples yield an initial brighter/whiter appearance. Solar Reflectance The total solar reflectance