THE ACTUAL STATE OF STAIN FROM CIGARETTE SMOKE OF FINISHING MATERIALS : Study on relative evaluation method for state of stain by cigarette smoke of wall finishing materials from a viewpoit of visually (Part 1)

Abstract

The purpose of this paper is to evaluate the stain relatively by cigarette smoke of finishing materials from a viewpoint of visually. We carried out the exposure test in smoking room, and described the actual state of stain by cigarette smoke of several finishing materials. As results of exposure test, the stain was increased gradually, and about 100 days after, it was stabilized, after that a degree of the stain which was measured by COLOR DIFFERENTIAL had not changed. Furthermore, we obtained the actual state of stain by cigarette smoke from another exposure test which had used 42 kinds of finishing materials.