雕刻凹版印刷被印材料與印版特性對浮凸觸感印紋影響之研究

A Study for the Influence of Substrate and Plate Properties on the Tactile Images in Intaglio Printing

曾正源(Chen-Yuan Tseng)

指導教授 ： 王希俊 博士

國立臺灣師範大學/科技學院/圖文傳播學系/碩士(2007年)

摘要

由於科技日新月異的發展，彩色影印、彩色掃描，數位列印的「數位複製技術」也跟著快速進步發展，導致有價證券的偽造更加容易，因而嚴重衝擊有價證券的安全性。
雕刻凹版印刷( Intaglio printing )的印紋線條清晰、墨膜厚實、色彩鮮艷、層次豐富，具有獨特的三維立體浮凸觸感(Tactility)，不僅彩色影印和彩色掃描列印無法複製，而且以其他印刷方法也難以仿製。因此，長久以來，雕刻凹版印刷是鈔券和有價證券防偽印刷(Anti-counterfeitnig printing)的骨幹。
根據荷蘭國家銀行Hans(2002)的研究指出，一般大眾辨識鈔券的步驟，是先以手指來觸覺(Feel)雕刻凹版的浮凸印紋，再以視覺(Look)辨識水印和安全線。由此可知，雕刻凹版浮凸觸感印紋，是有價證券第一道安全防線的重要安全特徵(Security Features)。所以，如何強化雕刻凹版印刷浮凸觸感的安全特徵，以提升有價證券的防偽功能，是一個值得探討的重要課題。
因此，本研究目的是針對雕刻凹版印刷過程，對影響印紋浮凸觸感的壓凸效果做一探討，採實驗研究法來蒐集相關資料，以被印材料的剛挺度與印版線幅二個因子作為研究變項，藉以瞭解提升雕刻凹版印刷浮凸觸感安全特徵的機制，並提供業界印刷適性之參考。
經由統計分析與討論，本研究結果發現：1.被印材料的剛挺度與印紋壓凸高度成反比，亦即使用較高剛挺度的被印材料印刷時，會獲致較低的印紋壓凸高。2.凹紋線幅與印紋壓凸高度成正比；也就是說，印版的凹紋線幅愈大時，會獲致較高的印紋壓凸高度。3.被印材料剛挺度與凹紋線幅對印紋壓凸高度具有交互作用關係；換言之，改變被印材料剛挺度時會改變印紋壓凸高度，而且若同時改變寬度時，印紋的壓凸高度也會受到影響。

關鍵字

安全特徵 ； 紙張剛挺度 ； 凹紋線幅 ； 浮凸觸感 ； 雕刻凹版印刷

並列摘要

Due to the development of science technology, the digital duplicating technology such as color copiers, color scanning had been progressed fast accordingly, and caused the counterfeit of securities more easy. Followed seriously impact the safety of security documents. The printed image of Intaglio printing showed sharpness line, thickly film, multi-layer tone and with unique three-dimension tactility. Not only the digital duplicating technology were unable to duplicate it, but also difficult to counterfeite even with other printing method. Thus, so far, Intaglio printing is the backbone of banknotes and securities.According to Hans (2002) reported, the steps of recognition on banknotes for pubic people is first to “feel” the intaglio tactile image with finger, and then “look” watermark and security thread with eyes. Therefore, the tactile images of intaglio printing is an important security feature. So, how to strengthen to tactility of intaglio printing, in order to improve the anti-counterfeit function of securities, is an important subject that is worth probing into.
Thus, the purpose of this study is to explore embossing effect which affect the tactility of printed images. This study used two factors experimental design, one is for paper stiffness, the other for engraving breadth. The result of the study indicated as follow :1.The stiffness is in inverse proportion to embossing height, in other words that will receive lower embossing height while using higher stiffness to print. 2.The engraving breadth is in direct proportion to embossing height, , that is to say when is the larger the engraving breadth , the higher the embossing height received is.3.The stiffness and breadth to highly having interaction, in another word that will change the embossing height while changing the stiffness, meanwhile, while changing the breadth, the height will be influenced too.

並列關鍵字

Security feature ； Stiffness of paper ； Breadth of engraving ； Tactility ； Intaglio printing

參考文獻

Armstrong Corporate (2006), Glossary, Retrieved 2006/10/20, From:www. armstrong.com/commflooringna/glossary.html

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Deinhammer H., Schwarzbach C., Kefeder R. & Faimann P.(2006). The Implication of Direct Laser Engraved Intaglio Plates on Banknote Security Optical Security and Counterfeit Deterrence Techniques VI. Vienna, Austria.

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Elsayd S., Morsy F., El-Sherbiny E. and Abdou S. (2002). Some factors affecting ink transfer in gravure printing. Pigment and Resin Technology. 2002,31,4. pp.234-240.