| 摘要 |
A sign and method of manufacturing same to impart information or warning to an individual, the sign having three distinct levels, each level of a separate color, the selective removal of a portion of one level revealing the color of the second level and the continued removal of the second level revealing the color of the third level, thereby forming a sign with a three dimensional message, the third or lower most level preferably being of a color translucent to light so as to enhance visibility or warning when backlit by natural or artificial light, the middle layer preferably being black in order to impart a text message, and the first layer or upper layer being of a high visibility color, preferably white.
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