Mr. Kazuhiko Shimada Profile

Kazuhiko Shimada

at National Printing Bureau

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Proceedings Article | 3 June 2004 Paper

Microstructural lines involving luminescence

Kazuhiko Shimada

Proceedings Volume 5310, (2004) https://doi.org/10.1117/12.526182

KEYWORDS: Luminescence, Ultraviolet radiation, Visualization, Printing, Security printing, Digital imaging, Image resolution, Image visualization, Visible radiation, Electronic imaging

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Japanese National Printing Bureau has been focused upon the development of anti-copy lines for many years. The basic concept with regard to security measure lies in the merge of art and technology. On this basis, our originally developed anti-copy lines show flexibility to various security designs. Our newest anti-copy lines comprising from the Tri-Branched and Divided Lines shows clearer latent image effect compared to that of our other developed anti-copy lines. However, the anti-copy effect of security printing lines with microstructure is deteriorating due to the emergence of digital image techniques with higher resolution. In this situation, this paper introduces a new security measure comprising from luminescence and security printing lines with microstructure. It gives rise to a latent image effect under UV light due to the characteristic microstructure while visually same density. The principle advantage is that the combination of the anti-copy and luminescent feature strongly enhances its secure effect in documents. There is no necessity of two kinds of inks and any specially designed equipment to produce security documents with microstructural lines involving luminescence.

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