In recent years, solar reflective material has attracted interest as a technique to reduce solar heating and as a sustainable household building material. Solar reflective materials have a specific capability to reflect more solar light with higher efficiency. This capability reduces thermal energy on surfaces which can penetrate into buildings.

In the JIS K 5602 and K 5675 standards, testing methods for analysis of the solar reflectance of reflective paint materials against solar light are outlined.

In this application note, some examples of evaluation of solar reflective paint material based on JIS K 5602 and K 5675 using Solar Transmittance/Reflectance Calculation Program is explained.