| 摘要 |
A security mark is produced on a micro-porous, synthetic paper, structure by changing light transmission properties of light pathways through the structure. The security mark is visible when the structure is illuminated. The present disclosure relates generally to a system for, and a method of, producing a security mark, also sometimes known as a watermark, on a micro-porous structure, including, but not limited to, a hydrophilic, polymeric sheet, substrate, material or membrane, also sometimes known as synthetic paper, by selectively modifying the light-transmitting characteristics of the micro-porous structure. |
