| 摘要 |
PROBLEM TO BE SOLVED: To provide a method of displaying a pattern of clear characters, logos and trademarks on a resin sheet without use of an ink or a laser.SOLUTION: Clear characters and patterns are displayed on the surface of a resin sheet by pressing a brush or a comb-like spring material 3 onto a part of the surface layer part of a resin sheet 1 and scratching, utilizing the property that scratching lightly the surface layer of a colored resin sheet 1 having orientation causes the surface layer to turn white. |
