What type of paint does "0" represent in the Solar Reflective Index?

The Solar Reflective Index (SRI) measures how well a material reflects solar energy and emits heat. A value of "0" on the SRI scale indicates a surface that absorbs virtually all solar radiation and reflects almost none, which corresponds to the properties of black paint. Black surfaces tend to have very low reflectivity and high absorbance of heat, making them less effective in hot climates where mitigating heat buildup is a concern. Higher SRI values represent lighter colors that reflect more sunlight and are more desirable for energy efficiency in roofing systems. Thus, "0" accurately signifies black paint due to its high absorbance and low reflectance characteristics.