Abstract: A marking material for use on a surface, the marking material including a binder material and a thermal-sensitive pigment. The marking material exhibits a first color different from a surface color. Upon being heated to a temperature of at least about 70° C., the marking material undergoes an irreversible color change from the first color to a second color. The second color renders the marking material effectively invisible to an observer. A marker and a method of using the marker are also disclosed.

Abstract: A reflective article includes: a substrate sheet, and a retroreflective sheet covering a surface of said substrate sheet. The reflective article is provided with substantially flat base portions and a plurality of protrusions being partitioned off by the base portions and protruding toward said retroreflective sheet, and delamination of the substrate sheet and the retroreflective sheet from each other is prevented by folding back at least a part of an edge of one of the sheets so as to wrap at least a part of an edge of the other sheet therein in a condition that the reflective article is fixed to at least a surface of an object.

Abstract: A reflector having a laminate with a light-transmissive substrate and light-transmissive retroreflective sheet is disclosed. The light-transmissive retroreflective sheet is attached to the substrate to cover the surface of the substrate. The reflector has light transmission properties as a whole, characterized in that, a plurality of depressions are formed on the backside of the substrate. A plurality of projections are formed on a reflection surface of the retroreflective sheet.