Abstract
Recently, the stone is used abundantly as building finishing materials from the viewpoint of durability and visual effects. We would like to examine them for the purpose of accumulating the analytical data of the factor affects visual evaluation of the surface stone finishing. It is widely recognized that the observation condition is the factor affects visual evaluations of man especially, the lighting has a great effect on. Therefore, we studied the difference of the impression at the time of changing an irradiation angle changing the sandstone type, surface finishing method. As a consequence, it was found that unevenness was closely related to the irradiation angle. And yet, it was not clear that the relationship of the comfort of stones and the irradiation angle.
