| 摘要 |
The drawing has a background (10) composed of at least a first region and a second region juxtaposed. Each of said regions comprises its own geometrical drawing so that the first region has a colour density which is stronger than that of the second region, said second region forming a pattern. An overprint (20) corresponding to said overprint is printed over the second region, said overprint (20) comprising geometrical drawings different than that of said second region and in a colour chosen to compensate the difference of colour density between said regions, so that the safety drawing appears uniform and with no pattern to the naked eye, but said pattern is clearly brought out and in another colour than that of the first region on a photocopy of the safety drawing.
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