Determination of Solar Reflectance of Paint Film in Accordance with JIS K5602

Introduction

When light that is radiated from the sun (solar radiation) reaches the surface of the earth, not only does it pass through window glass to raise the indoor temperature, after being absorbed and accumulated in the roof material and wall material of the building, it is discharged as heat both inside and outside of the building whether it is day or night. Therefore, construction of roofs and rooftops using paint coatings with high solar reflectance significantly enhances cooling efficiency and effectively reduces the urban heat island phenomenon. JIS K5602 "Determination of reflectance of solar radiation by paint film" is a test method used for evaluating the solar reflectance of such paint coatings. Here we introduce the measurement of solar reflectance of paint film according to this test method. Other articles that we have published regarding solar reflectance include one for glass plate, Application News No. A404 "Glass Plate Analysis in Accordance with JIS R3106," and another for glazings, No. A412 "Analysis of Adhesive Films for Glazings Conducted in Accordance with JIS A5759."

October 22, 2010 GMT